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<SEC-DOCUMENT>0000950129-05-008865.txt : 20050831
<SEC-HEADER>0000950129-05-008865.hdr.sgml : 20050831
<ACCEPTANCE-DATETIME>20050831113700
ACCESSION NUMBER:		0000950129-05-008865
CONFORMED SUBMISSION TYPE:	SC 13D/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20050831
DATE AS OF CHANGE:		20050831
GROUP MEMBERS:		BROG GP INC
GROUP MEMBERS:		BURLINGTON RESOURCES OIL & GAS COMPANY LP

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PERMIAN BASIN ROYALTY TRUST
		CENTRAL INDEX KEY:			0000319654
		STANDARD INDUSTRIAL CLASSIFICATION:	OIL ROYALTY TRADERS [6792]
		IRS NUMBER:				756280532
		STATE OF INCORPORATION:			TX
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13D/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-34075
		FILM NUMBER:		051060709

	BUSINESS ADDRESS:	
		STREET 1:		BANK OF AMERICA N A TRUST DEPARTMENT
		STREET 2:		P O BOX 1317 NK OF TEXAS NA TRUST DEPT
		CITY:			FT WORTH
		STATE:			TX
		ZIP:			76102
		BUSINESS PHONE:		8173906905

	MAIL ADDRESS:	
		STREET 1:		1300 SUMMIT AVENUE SUITE 300
		CITY:			FORTH WORTH
		STATE:			TX
		ZIP:			76102

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			BURLINGTON RESOURCES INC
		CENTRAL INDEX KEY:			0000833320
		STANDARD INDUSTRIAL CLASSIFICATION:	CRUDE PETROLEUM & NATURAL GAS [1311]
		IRS NUMBER:				911413284
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13D/A

	BUSINESS ADDRESS:	
		STREET 1:		717 TEXAS AVENUE
		STREET 2:		SUITE 2100
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77002
		BUSINESS PHONE:		7136249000

	MAIL ADDRESS:	
		STREET 1:		717 TEXAS AVENUE
		STREET 2:		STE 2100
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77002
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13D/A
<SEQUENCE>1
<FILENAME>h28472sc13dza.htm
<DESCRIPTION>BURLINGTON RESOURCES INC. FOR PERMIAN BASIN ROYALTY TRUST
<TEXT>
<HTML>
<HEAD>
<TITLE>sc13dza</TITLE>
</HEAD>
<BODY bgcolor="#FFFFFF">
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<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>
<TABLE align="right" width="160" border="1" cellspacing="0" cellpadding="1">
<TR><TD align="center" nowrap>OMB APPROVAL</TD></TR>
<TR><TD nowrap>OMB Number: 3235-0145</TD></TR>
<TR><TD nowrap>Expires: December 31, 2005</TD></TR>
<TR><TD nowrap>Estimated average burden<BR>
hours per response...15</TD></TR></TABLE>

<BR clear="right">
<BR clear="right">

<P align="center" style="font-size: 14pt"><B>UNITED STATES<BR>
SECURITIES AND EXCHANGE COMMISSION</B><BR>
<DIV align="center" style="font-size: 12pt"><B>Washington, D.C. 20549</B></DIV>
<P align="center" style="font-size: 18pt"><B>SCHEDULE 13D/A</B>

<P align="center"><B>Under the Securities Exchange Act of 1934<BR>
(Amendment No. 6)*</B>

<P><DIV align="center" style="font-size: 24pt">Permian Basin Royalty Trust</DIV>
<HR size="1" noshade>
<DIV align="center" style="font-size: 10pt">(Name of Issuer)</DIV>

<P><DIV align="center" style="font-size: 10pt">Units of Beneficial Interest<BR>
<HR size="1" noshade>
(Title of Class of Securities)</DIV>

<P><DIV align="center" style="font-size: 10pt">71423106<BR>
<HR size="1" noshade>
(CUSIP Number)</DIV>

<P> <DIV align="center" style="font-size: 10pt"> Frederick J. Plaeger, Esq.<BR>
717 Texas, Suite 2100<BR>
Houston, Texas 77002<BR>
713-624-9000<BR>
<HR size="1" noshade>
(Name, Address and Telephone Number of Person<BR>Authorized to Receive Notices and Communications)</DIV>
<P><DIV align="center" style="font-size: 10pt">August 8, 2005<BR>
<HR size="1" noshade>
(Date of Event Which Requires Filing of this Statement)</DIV>
<P align="left" style="font-size: 10pt">If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of &#167;&#167;240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box. <FONT face="wingdings" size="2">&#111;</FONT>
<P>
<P align="left" style="font-size: 10pt"><B>Note:</B> Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See &#167;240.13d-7 for other parties to whom copies are to be sent.
<P>
<P align="left" style="font-size: 10pt"><SUP>*</SUP> The remainder of this cover page shall be filled out for a reporting person&#146;s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page.
<P>
<P align="left" style="font-size: 10pt">The information required on the remainder of this cover page shall not be deemed to be &#147;filed&#148; for the purpose of Section 18 of the Securities Exchange Act of 1934 (&#147;Act&#148;) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).
<P>
<P align="left" style="font-size: 10pt"><B>Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.</B>

<P align="center" style="font-size: 10pt">

<!-- PAGEBREAK -->
<P><HR noshade><P>
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>


<TABLE width="100%" border="0" cellspacing="0" cellpadding="4" style="font-size: 10pt">
<TR>
<TD width="4%">&nbsp;</TD>
<TD width="3%">&nbsp;</TD>
<TD width="3%">&nbsp;</TD>
<TD width="3%">&nbsp;</TD>
<TD width="28%">&nbsp;</TD>
<TD width="14%">&nbsp;</TD>
<TD width="45%">&nbsp;</TD>
</TR>

<TR>
<TD colspan="5">CUSIP No. 714236106 </td> <TD colspan="2" align="right">Page 2 of 8 </TD>
</TR>

<TR><TD colspan=7><HR noshade></TD></TR>

<TR>
<TD>&nbsp;</TD>
<TD valign=top>1.</TD>
<TD valign=top colspan=3>Name of Reporting Person:<BR>Burlington Resources Inc.</TD>
<TD valign=top colspan=2>I.R.S. Identification Nos. of above persons (entities only):<BR>
91-1413284</TD>
</TR>

<TR><TD colspan=7><HR noshade></TD></TR>

<TR>
<TD>&nbsp;</TD>
<TD valign=top>2.</TD>
<TD valign=top colspan=5>Check the Appropriate Box if a Member of a Group (See Instructions):</TD>
</TR>

<TR>
<TD>&nbsp;</TD>
<TD>&nbsp;</TD>
<TD valign=top>(a)</TD>
<TD valign=top><FONT face="wingdings" size="2">&#254;</FONT></TD>
<TD valign=top colspan=3>&nbsp;</TD>
</TR>

<TR>
<TD>&nbsp;</TD>
<TD>&nbsp;</TD>
<TD valign=top>(b)</TD>
<TD valign=top><FONT face="wingdings" size="2">&#111;</FONT></TD>
<TD valign=top colspan=3>&nbsp;</TD>
</TR>

<TR><TD colspan=7><HR noshade></TD></TR>

<TR>
<TD>&nbsp;</TD>
<TD valign=top>3.</TD>
<TD valign=top colspan=5>SEC Use Only:</TD>
</TR>

<TR><TD colspan=7><HR noshade></TD></TR>

<TR>
<TD>&nbsp;</TD>
<TD valign=top>4.</TD>
<TD valign=top colspan=5>Source of Funds (See Instructions):<BR>N/A</TD>
</TR>

<TR><TD colspan=7><HR noshade></TD></TR>


<TR>
<TD>&nbsp;</TD>
<TD valign=top>5.</TD>
<TD valign=top colspan=5>Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e): <FONT face="wingdings" size="2">&#111;</FONT> </TD>
</TR>

<TR><TD colspan=7><HR noshade></TD></TR>

<TR>
<TD>&nbsp;</TD>
<TD valign=top>6.</TD>
<TD valign=top colspan=5>Citizenship or Place of Organization:<BR>Delaware</TD>
</TR>

<TR><TD colspan=7><HR noshade></TD></TR>

<TR><TD colspan="3" rowspan="8" align="center">Number of<BR>Shares<BR>Beneficially<BR>Owned by<BR> Each Reporting<BR>Person With</TD></TR>

<TR><TD valign=top>7.</TD>
<TD valign=top colspan=3>Sole Voting Power:<BR>19,327,741</TD></TR>

<TR><TD colspan=4><hr noshade></TD></TR>

<TR><TD valign=top>8.</TD><TD valign=top colspan=3> Shared Voting Power:<BR></TD></TR>

<TR><TD colspan=4><hr noshade></TD></TR>

<TR><TD valign=top>9.</TD><TD valign=top colspan=3> Sole Dispositive Power:<BR>19,327,741</TD></TR>

<TR><TD colspan=4><hr noshade></TD></TR>

<TR><TD valign=top>10.</TD><TD valign=top colspan=3>Shared Dispositive Power:<BR></TD></TR>

<TR><TD colspan=7><hr noshade></TD></TR>

<TR><TD>&nbsp;</TD>
<TD valign=top>11.</TD><TD valign=top colspan=5>Aggregate Amount Beneficially Owned by Each Reporting Person: <BR>19,327,741</TD>
</TR>

<TR><TD colspan=7><hr noshade></TD></TR>

<TR><TD>&nbsp;</TD>
<TD valign=top>12.</TD><TD valign=top colspan=5>Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions):<BR> <FONT face="wingdings" size="2">&#111;</FONT> </TD>
</TR>

<TR><TD colspan=7><hr noshade></TD></TR>

<TR><TD>&nbsp;</TD>
<TD valign=top>13.</TD><TD valign=top colspan=5>Percent of Class Represented by Amount in Row (11):<BR>41.5%</TD></TR>

<TR><TD colspan=7><hr noshade></TD></TR>

<TR><TD>&nbsp;</TD>
<TD valign=top>14.</TD><TD valign=top colspan=5>Type of Reporting Person (See Instructions):<BR>CO</TD></TR>

<TR><TD colspan=7><hr noshade></TD></TR>
</TABLE>

<P align="center" style="font-size: 10pt">

<!-- PAGEBREAK -->
<P><HR noshade><P>
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<TABLE width="100%" border="0" cellspacing="0" cellpadding="4" style="font-size: 10pt">
<TR>
<TD width="4%">&nbsp;</TD>
<TD width="3%">&nbsp;</TD>
<TD width="3%">&nbsp;</TD>
<TD width="3%">&nbsp;</TD>
<TD width="28%">&nbsp;</TD>
<TD width="14%">&nbsp;</TD>
<TD width="45%">&nbsp;</TD>
</TR>

<TR>
<TD colspan="5">CUSIP No. 714236106 </td> <TD colspan="2" align="right">Page 3 of 8 </TD>
</TR>

<TR><TD colspan=7><HR noshade></TD></TR>

<TR>
<TD>&nbsp;</TD>
<TD valign=top>1.</TD>
<TD valign=top colspan=3>Name of Reporting Person:<BR>Burlington Resources Oil & Gas Company LP</TD>
<TD valign=top colspan=2>I.R.S. Identification Nos. of above persons (entities only):<BR>
41-1400579</TD>
</TR>

<TR><TD colspan=7><HR noshade></TD></TR>

<TR>
<TD>&nbsp;</TD>
<TD valign=top>2.</TD>
<TD valign=top colspan=5>Check the Appropriate Box if a Member of a Group (See Instructions):</TD>
</TR>

<TR>
<TD>&nbsp;</TD>
<TD>&nbsp;</TD>
<TD valign=top>(a)</TD>
<TD valign=top><FONT face="wingdings" size="2">&#254;</FONT></TD>
<TD valign=top colspan=3>&nbsp;</TD>
</TR>

<TR>
<TD>&nbsp;</TD>
<TD>&nbsp;</TD>
<TD valign=top>(b)</TD>
<TD valign=top><FONT face="wingdings" size="2">&#111;</FONT></TD>
<TD valign=top colspan=3>&nbsp;</TD>
</TR>

<TR><TD colspan=7><HR noshade></TD></TR>

<TR>
<TD>&nbsp;</TD>
<TD valign=top>3.</TD>
<TD valign=top colspan=5>SEC Use Only:</TD>
</TR>

<TR><TD colspan=7><HR noshade></TD></TR>

<TR>
<TD>&nbsp;</TD>
<TD valign=top>4.</TD>
<TD valign=top colspan=5>Source of Funds (See Instructions):<BR>N/A</TD>
</TR>

<TR><TD colspan=7><HR noshade></TD></TR>


<TR>
<TD>&nbsp;</TD>
<TD valign=top>5.</TD>
<TD valign=top colspan=5>Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e): <FONT face="wingdings" size="2">&#111;</FONT> </TD>
</TR>

<TR><TD colspan=7><HR noshade></TD></TR>

<TR>
<TD>&nbsp;</TD>
<TD valign=top>6.</TD>
<TD valign=top colspan=5>Citizenship or Place of Organization:<BR>Delaware</TD>
</TR>

<TR><TD colspan=7><HR noshade></TD></TR>

<TR><TD colspan="3" rowspan="8" align="center">Number of<BR>Shares<BR>Beneficially<BR>Owned by<BR> Each Reporting<BR>Person With</TD></TR>

<TR><TD valign=top>7.</TD>
<TD valign=top colspan=3>Sole Voting Power:<BR></TD></TR>

<TR><TD colspan=4><hr noshade></TD></TR>

<TR><TD valign=top>8.</TD><TD valign=top colspan=3> Shared Voting Power:<BR>19,327,741</TD></TR>

<TR><TD colspan=4><hr noshade></TD></TR>

<TR><TD valign=top>9.</TD><TD valign=top colspan=3> Sole Dispositive Power:<BR></TD></TR>

<TR><TD colspan=4><hr noshade></TD></TR>

<TR><TD valign=top>10.</TD><TD valign=top colspan=3>Shared Dispositive Power:<BR>19,327,741</TD></TR>

<TR><TD colspan=7><hr noshade></TD></TR>

<TR><TD>&nbsp;</TD>
<TD valign=top>11.</TD><TD valign=top colspan=5>Aggregate Amount Beneficially Owned by Each Reporting Person: <BR>19,327,741</TD>
</TR>

<TR><TD colspan=7><hr noshade></TD></TR>

<TR><TD>&nbsp;</TD>
<TD valign=top>12.</TD><TD valign=top colspan=5>Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions):<BR> <FONT face="wingdings" size="2">&#111;</FONT> </TD>
</TR>

<TR><TD colspan=7><hr noshade></TD></TR>

<TR><TD>&nbsp;</TD>
<TD valign=top>13.</TD><TD valign=top colspan=5>Percent of Class Represented by Amount in Row (11):<BR>41.5%</TD></TR>

<TR><TD colspan=7><hr noshade></TD></TR>

<TR><TD>&nbsp;</TD>
<TD valign=top>14.</TD><TD valign=top colspan=5>Type of Reporting Person (See Instructions):<BR>PN</TD></TR>

<TR><TD colspan=7><hr noshade></TD></TR>
</TABLE>

<P align="center" style="font-size: 10pt">

<!-- PAGEBREAK -->
<P><HR noshade><P>
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<TABLE width="100%" border="0" cellspacing="0" cellpadding="4" style="font-size: 10pt">
<TR>
<TD width="4%">&nbsp;</TD>
<TD width="3%">&nbsp;</TD>
<TD width="3%">&nbsp;</TD>
<TD width="3%">&nbsp;</TD>
<TD width="28%">&nbsp;</TD>
<TD width="14%">&nbsp;</TD>
<TD width="45%">&nbsp;</TD>
</TR>

<TR>
<TD colspan="5">CUSIP No. 714236106 </td> <TD colspan="2" align="right">Page 4 of 8 </TD>
</TR>

<TR><TD colspan=7><HR noshade></TD></TR>

<TR>
<TD>&nbsp;</TD>
<TD valign=top>1.</TD>
<TD valign=top colspan=3>Name of Reporting Person:<BR>BROG GP Inc.</TD>
<TD valign=top colspan=2>I.R.S. Identification Nos. of above persons (entities only):<BR>
76-0667087</TD>
</TR>

<TR><TD colspan=7><HR noshade></TD></TR>

<TR>
<TD>&nbsp;</TD>
<TD valign=top>2.</TD>
<TD valign=top colspan=5>Check the Appropriate Box if a Member of a Group (See Instructions):</TD>
</TR>

<TR>
<TD>&nbsp;</TD>
<TD>&nbsp;</TD>
<TD valign=top>(a)</TD>
<TD valign=top><FONT face="wingdings" size="2">&#254;</FONT></TD>
<TD valign=top colspan=3>&nbsp;</TD>
</TR>

<TR>
<TD>&nbsp;</TD>
<TD>&nbsp;</TD>
<TD valign=top>(b)</TD>
<TD valign=top><FONT face="wingdings" size="2">&#111;</FONT></TD>
<TD valign=top colspan=3>&nbsp;</TD>
</TR>

<TR><TD colspan=7><HR noshade></TD></TR>

<TR>
<TD>&nbsp;</TD>
<TD valign=top>3.</TD>
<TD valign=top colspan=5>SEC Use Only:</TD>
</TR>

<TR><TD colspan=7><HR noshade></TD></TR>

<TR>
<TD>&nbsp;</TD>
<TD valign=top>4.</TD>
<TD valign=top colspan=5>Source of Funds (See Instructions):<BR>N/A</TD>
</TR>

<TR><TD colspan=7><HR noshade></TD></TR>


<TR>
<TD>&nbsp;</TD>
<TD valign=top>5.</TD>
<TD valign=top colspan=5>Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e): <FONT face="wingdings" size="2">&#111;</FONT> </TD>
</TR>

<TR><TD colspan=7><HR noshade></TD></TR>

<TR>
<TD>&nbsp;</TD>
<TD valign=top>6.</TD>
<TD valign=top colspan=5>Citizenship or Place of Organization:<BR>Delaware</TD>
</TR>

<TR><TD colspan=7><HR noshade></TD></TR>

<TR><TD colspan="3" rowspan="8" align="center">Number of<BR>Shares<BR>Beneficially<BR>Owned by<BR> Each Reporting<BR>Person With</TD></TR>

<TR><TD valign=top>7.</TD>
<TD valign=top colspan=3>Sole Voting Power:<BR></TD></TR>

<TR><TD colspan=4><hr noshade></TD></TR>

<TR><TD valign=top>8.</TD><TD valign=top colspan=3> Shared Voting Power:<BR>19,327,741</TD></TR>

<TR><TD colspan=4><hr noshade></TD></TR>

<TR><TD valign=top>9.</TD><TD valign=top colspan=3> Sole Dispositive Power:<BR></TD></TR>

<TR><TD colspan=4><hr noshade></TD></TR>

<TR><TD valign=top>10.</TD><TD valign=top colspan=3>Shared Dispositive Power:<BR>19,327,741</TD></TR>

<TR><TD colspan=7><hr noshade></TD></TR>

<TR><TD>&nbsp;</TD>
<TD valign=top>11.</TD><TD valign=top colspan=5>Aggregate Amount Beneficially Owned by Each Reporting Person: <BR>19,327,741</TD>
</TR>

<TR><TD colspan=7><hr noshade></TD></TR>

<TR><TD>&nbsp;</TD>
<TD valign=top>12.</TD><TD valign=top colspan=5>Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions):<BR> <FONT face="wingdings" size="2">&#111;</FONT> </TD>
</TR>

<TR><TD colspan=7><hr noshade></TD></TR>

<TR><TD>&nbsp;</TD>
<TD valign=top>13.</TD><TD valign=top colspan=5>Percent of Class Represented by Amount in Row (11):<BR>41.5%</TD></TR>

<TR><TD colspan=7><hr noshade></TD></TR>

<TR><TD>&nbsp;</TD>
<TD valign=top>14.</TD><TD valign=top colspan=5>Type of Reporting Person (See Instructions):<BR>CO</TD></TR>

<TR><TD colspan=7><hr noshade></TD></TR>
</TABLE>

<P align="center" style="font-size: 10pt">
<!-- PAGEBREAK -->
<P><HR noshade><P>
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>
<DIV style="font-family: 'Times New Roman',Times,serif">



<DIV align="right" style="font-size: 10pt; margin-top: 12pt">Page 5 of 7
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>AMENDMENT NO. 6 TO ORIGINAL REPORT ON SCHEDULE 13D</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>Introduction</B>
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This constitutes Amendment No.&nbsp;6 (the &#147;<U>Amendment</U>&#148;) to the statement on Schedule&nbsp;13D
originally filed with the Securities and Exchange Commission (&#147;<U>SEC</U>&#148;) on April&nbsp;17, 1993 (the
&#147;<U>Original 13D Filing</U>&#148;), on behalf of Burlington Resources Inc., a Delaware Corporation
(&#147;<U>Parent</U>&#148;), and Southland Royalty Company (&#147;<U>Southland</U>&#148;), the predecessor of
Burlington Resources Oil &#038; Gas Company LP, a Delaware limited partnership (&#147;<U>BROG</U>&#148;). BROG
is an indirect wholly-owned subsidiary of Parent and BROG GP Inc. is its sole general partner
(&#147;<U>BROG GP</U>&#148;). BROG GP is a wholly-owned subsidiary of Parent. As used herein, the term
&#147;<U>Reporting Persons</U>&#148; refers to Parent, BROG and BROG GP, collectively. The Original 13D
Filing has been previously amended by Amendment Nos. 1-5 filed with the SEC (the Original 13D
Filing as amended is referred to herein collectively as the &#147;<U>Statement</U>&#148;), relating to the
units of beneficial interest of Permian Basin Royalty Trust (&#147;<U>PBT</U>&#148;). Because this filing
constitutes the first electronic amendment to the Statement, this filing amends and restates the
Statement in its entirety.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>Item&nbsp;1. </B><B><I>Security and Issuer</I></B>
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The information in Item&nbsp;1 is hereby amended and restated in its entirety as follows:
</DIV>

<DIV style="margin-top: 6pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="2%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left">(a)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD><U>Issuer Name and Address</U>: The name of the issuer is Permian Basin
Royalty Trust (&#147;<U>PBT</U>&#148;) and its principal executive offices are located at 901
Main Street, Dallas, Texas 75202, telephone (214)&nbsp;209-2400.</TD>
</TR>

<TR>
    <TD style="font-size: 6pt">&nbsp;</TD>
</TR><TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="2%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left">(b)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD><U>Title of Issuer Securities</U>: The class of securities to which this
Schedule relates is Units of Beneficial Interest of the Trust.</TD>
</TR>

</TABLE>
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>Item&nbsp;2. </B><B><I>Identity and Background</I></B>
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The information in Item&nbsp;2 is hereby amended and restated in its entirety as follows:
</DIV>

<DIV style="margin-top: 6pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="2%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left">(a)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD><U>Name</U>: This Amendment No.&nbsp;6 to Schedule&nbsp;13D is being filed by the following:</TD>
</TR>

</TABLE>
</DIV>

<DIV style="margin-top: 6pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="6%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left"><B>&#149;</B></TD>
    <TD width="1%">&nbsp;</TD>
    <TD>Burlington Resources Inc., a Delaware corporation;</TD>
</TR>

<TR>
    <TD style="font-size: 6pt">&nbsp;</TD>
</TR><TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="6%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left"><B>&#149;</B></TD>
    <TD width="1%">&nbsp;</TD>
    <TD>BROG GP Inc., a Delaware corporation and a wholly-owned subsidiary of Parent; and</TD>
</TR>

<TR>
    <TD style="font-size: 6pt">&nbsp;</TD>
</TR><TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="6%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left"><B>&#149;</B></TD>
    <TD width="1%">&nbsp;</TD>
    <TD>Burlington Resources Oil &#038; Gas Company LP, a Delaware limited partnership
and the successor in interest to Southland.</TD>
</TR>

</TABLE>
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;On August&nbsp;17, 1993, Southland commenced a public tender offer to purchase for cash any and all
outstanding Units of PBT, which tender offer was effected pursuant to the Offer to Purchase, dated
August&nbsp;17, 1993, as amended (the &#147;<U>Offer to Purchase</U>&#148;). At the time of such tender offer
and the purchase by Southland of 27,577,741 Units tendered for purchase pursuant to the offer,
Southland was an indirect wholly-owned corporate subsidiary of Parent. Since 1993 Southland&#146;s
assets and operations have been succeeded to by BROG. During the period from December&nbsp;28, 1993 to
August&nbsp;8, 2005 Southland, or its successor BROG, maintained ownership of 27,577,741 Units, or
59.17% of the total number of Units outstanding.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b)&nbsp;<U>Address</U>: The principal executive offices of Parent, BROG GP and BROG are located
at 717 Texas Avenue, Suite&nbsp;2100, Houston, Texas 77002.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(c)&nbsp;<U>Principal Business</U>: Parent is among the world&#146;s largest independent oil and gas
companies and holds one of the industry&#146;s leading positions in North American natural gas reserves
and production. BROG, one of Parent&#146;s principal subsidiaries, owns a significant portion of
Parent&#146;s domestic U.S. oil and gas properties and is the record holder of the 19,327,741 trust
units for which this Amendment No.&nbsp;6 to the Statement is being filed. BROG GP is the sole general
partner of BROG.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(d)-(e) <U>Criminal Proceedings; Civil Injunction Proceedings</U>: During the last five
years none of Parent, BROG or BROG GP has been involved in a criminal proceeding or civil
proceeding of the type referred to in items (d)&nbsp;and (e)&nbsp;under the Instructions to Item&nbsp;2 of
Schedule&nbsp;13D.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(f)&nbsp;<U>Citizenship</U>: Parent is a Delaware, U.S.A. corporation. BROG is a Delaware, U.S.A
limited partnership. BROG GP is a Delaware, U.S.A. corporation.
</DIV>

<P align="center" style="font-size: 10pt">&nbsp;
</DIV>

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<DIV style="font-family: 'Times New Roman',Times,serif">

<DIV align="right" style="font-size: 10pt; margin-top: 12pt">Page 6 of 7
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>Item&nbsp;3. </B><B><I>Source and Amount of Funds or Other Consideration</I></B>
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The information in Item&nbsp;3 is hereby amended and restated in its entirety as follows:
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;As stated under &#147;Special Factors &#151; Financing of the Offer&#148; in the Offer to Purchase, all
funds used by Southland in 1993 to purchase the 27,577,741 Units were obtained through capital
contributions or advances by Parent. Such funds were obtained by Parent from its working capital.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>Item&nbsp;4. </B><B><I>Purpose of the Transaction</I></B>
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The information in Item&nbsp;4 is hereby amended and restated in its entirety as follows:
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;On December&nbsp;29, 1993, Parent disclosed that pursuant to the tender offer by Southland for any
and all of the outstanding units of beneficial interest of PBT that it was the owner of 27,577,741
Units. The tender offer, which commenced in August&nbsp;1993 and ended in December&nbsp;1993, was at $4.85
per Unit, net to the seller in cash, pursuant to the Offer to Purchase, dated August&nbsp;17, 1993, a
copy of which is included as an exhibit to this Amendment No.&nbsp;6 to Schedule&nbsp;13D.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;On April&nbsp;14, 2005 Parent and PBT filed a registration statement on Form S-3 with the
Securities and Exchange Commission relating to the proposed resale by the Reporting Persons of any
or all of the 27,577,741 Units of which they are the beneficial owners. On August&nbsp;8, 2005, BROG
sold a total of 8,250,000 Units at a price of $15.45 per Unit (before underwriting discount and
expenses of the Offering) in an underwritten public offering to a syndicate of underwriters
consisting of Goldman, Sachs &#038; Co., Lehman Brothers Inc., Citigroup Global Markets Inc., Wachovia
Capital Markets, LLC, RBC Capital Markets Corporation and Stifel Nicolaus &#038; Company, Incorporated
(collectively, the &#147;<U>Underwriters</U>&#148;). In addition, BROG has granted the Underwriters a
30-day option to purchase up to 1,237,500 additional Units from Parent on the same terms and
conditions.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;None of the Reporting Persons has any present plan or proposal that would relate to or result
in any of the actions or matters referred to in subparagraphs (a) &#151; (j)&nbsp;of Item&nbsp;4 of Schedule&nbsp;13D.
Parent intends to review its remaining ownership interest in PBT and may elect in the future to
sell some or all of the remaining 19,327,741 Units pursuant to the registration statement referred
to above or otherwise.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>Item&nbsp;5. </B><B><I>Interest in Securities of the Issuer.</I></B>
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The information in Item&nbsp;5 is hereby amended and restated in its entirety as follows:
</DIV>

<DIV style="margin-top: 6pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="2%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left">(a)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD><U>Aggregate Number and Percentage of the Class&nbsp;Beneficially Owned</U>: The Reporting
Persons collectively own 19,327,741 Units, or 41.5%, of the 46,608,796 Units reported by PBT to be
outstanding as of August&nbsp;1, 2005.</TD>
</TR>

<TR>
    <TD style="font-size: 6pt">&nbsp;</TD>
</TR><TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="2%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left">(b)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD><U>Sole/Shared Voting and Dispositive Power</U>:</TD>
</TR>

</TABLE>
</DIV>

<DIV style="margin-top: 6pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="6%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left"><B>&#149;</B></TD>
    <TD width="1%">&nbsp;</TD>
    <TD><U>BROG</U>: BROG is the record owner of the Units, but its sole general
partner, BROG GP, has voting and dispositive power over those Units, which BROG
GP may be deemed to share with Parent.</TD>
</TR>

<TR>
    <TD style="font-size: 6pt">&nbsp;</TD>
</TR><TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="6%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left"><B>&#149;</B></TD>
    <TD width="1%">&nbsp;</TD>
    <TD><U>BROG GP</U>: as general partner of BROG, has voting and dispositive
power over the Units, but as a wholly-owned subsidiary of Parent, BROG could be
deemed to share voting and dispositive power over the Units with Parent.</TD>
</TR>

<TR>
    <TD style="font-size: 6pt">&nbsp;</TD>
</TR><TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="6%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left"><B>&#149;</B></TD>
    <TD width="1%">&nbsp;</TD>
    <TD><U>Parent</U>: as the sole owner of the capital stock of BROG GP and of the
limited partner interests of BROG, is the indirect owner of the Units and may be
deemed to share voting and dispositive power with BROG GP or to have indirect
voting and dispositive power.</TD>
</TR>

</TABLE>
</DIV>

<P align="center" style="font-size: 10pt">&nbsp;
</DIV>

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<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">

<DIV align="right" style="font-size: 10pt; margin-top: 12pt">Page 7 of 7
</DIV>


<DIV style="margin-top: 6pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="2%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left">(c)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD><U>Recent Transactions in Units</U>: See the response to Item&nbsp;4 above.</TD>
</TR>

</TABLE>
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>Item&nbsp;6. </B><B><I>Contracts, Arrangements, Understandings or Relationships With Respect to Securities of
the Issuer.</I></B>
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The information in Item&nbsp;6 is hereby amended and restated in its entirety as follows:
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Pursuant to the Underwriting Agreement, dated August&nbsp;2, 2005 among Parent, BROG, PBT and the
Underwriters, Parent granted the Underwriters a 30-day option to purchase up to 1,237,500
additional Units on the terms and conditions set forth therein.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>Item&nbsp;7. </B><B><I>Exhibits.</I></B>
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The information in Item&nbsp;7 is hereby amended and restated in its entirety as follows:
</DIV>

<DIV style="margin-top: 6pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="2%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left"><B>&#149;</B></TD>
    <TD width="1%">&nbsp;</TD>
    <TD>Exhibit&nbsp;7(a)(1) Offer to Purchase, dated August&nbsp;17, 1993 (Incorporated by
reference to Exhibit a(1) to the Schedule&nbsp;14D-1 and Schedule&nbsp;13D filed by
Southland and Parent on August&nbsp;17, 1993).</TD>
</TR>

<TR>
    <TD style="font-size: 6pt">&nbsp;</TD>
</TR><TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="2%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left"><B>&#149;</B></TD>
    <TD width="1%">&nbsp;</TD>
    <TD>Exhibit&nbsp;7(a)(2) Underwriting Agreement, dated
August&nbsp;2, 2005, among Parent,
BROG, PBT and the Underwriters (Incorporated by reference to Exhibit&nbsp;1.1 to the
Form 8-K filed by Parent on August&nbsp;8, 2005).</TD>
</TR>

</TABLE>
</DIV>
<DIV align="left"><DIV style="font-size: 3pt; margin-top: 16pt; width: 15%; border-top: 1px solid #000000">&nbsp;</DIV></DIV>









<DIV style="margin-top: 0pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="2%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left"><B>&#149;</B></TD>
    <TD width="1%">&nbsp;</TD>
    <TD>Incorporated by reference.</TD>
</TR>

</TABLE>
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;After reasonable inquiry and to the best of my knowledge and belief, I certify that the
information set forth in this statement is true, complete and correct.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt">Dated: August 31, 2005
</DIV>


<TABLE width="100%" border="0" cellspacing="0" cellpadding="0" style="font-size: 10pt">
<TR>
    <TD width="48%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="40%">&nbsp;</TD>
    <TD width="10%">&nbsp;</TD>
</TR>
<TR>
    <TD valign="top" align="left">&nbsp;</TD>
    <TD colspan="3" align="left">BURLINGTON RESOURCES INC. <BR>
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD valign="top">By:&nbsp;&nbsp;</TD>

<TD colspan="2" style="border-bottom: 1px solid #000000" align="left">/s/
Frederick J. Plaeger II&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top">Name:&nbsp;&nbsp;</TD>
    <TD align="left">Frederick J. Plaeger II&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top">Title:&nbsp;&nbsp;</TD>
    <TD align="left">Vice President and General Counsel&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR>
<TR>
    <TD colspan="5">&nbsp;</TD>
</TR>
<TR>
    <TD valign="top" align="left">&nbsp;</TD>
    <TD colspan="3" align="left">BROG GP INC.<BR>
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD valign="top">By:&nbsp;&nbsp;</TD>
    <TD colspan="2" style="border-bottom: 1px solid #000000" align="left">/s/
Frederick J. Plaeger II&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top">Name:&nbsp;&nbsp;</TD>
    <TD align="left">Frederick J. Plaeger II&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top">Title:&nbsp;&nbsp;</TD>
    <TD align="left">Vice President and General Counsel&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR>
<TR>
    <TD colspan="5">&nbsp;</TD>
</TR>
<TR>
    <TD valign="top" align="left">&nbsp;</TD>
    <TD colspan="3" align="left">BURLINGTON RESOURCES OIL &#038; GAS COMPANY LP<BR>
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD valign="top">By:&nbsp;&nbsp;</TD>
    <TD colspan="2" align="left">BROG GP INC.,
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="2" align="left">Sole General Partner&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="2" align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR>
<TR>
    <TD colspan="5">&nbsp;</TD>
</TR>
<TR>
    <TD valign="top" align="left">&nbsp;</TD>
    <TD colspan="3" align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD valign="top">By:&nbsp;&nbsp;</TD>
    <TD colspan="2" style="border-bottom: 1px solid #000000" align="left">
/s/
Frederick J. Plaeger II&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top">Name:&nbsp;&nbsp;</TD>
    <TD align="left">Frederick J. Plaeger II&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top">Title:&nbsp;&nbsp;</TD>
    <TD align="left">Vice President and General Counsel&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR>
<TR>
    <TD colspan="5">&nbsp;</TD>
</TR>
</TABLE>


<P align="center" style="font-size: 10pt">&nbsp;
</DIV>


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