<DOCUMENT>
<TYPE>EX-99.77B ACCT LTTR
<SEQUENCE>2
<FILENAME>Item77B.txt
<DESCRIPTION>77B
<TEXT>
Report of Independent Registered Public Accounting Firm

To the Board of Trustees and Shareholders of
Advent Claymore Convertible Securities and Income Fund

In planning and performing our audit of the financial statements of
Advent Claymore Convertible Securities and Income Fund (the Fund) as of
and for the year ended October 31, 2017, in accordance with the standards
of the Public Company Accounting Oversight Board (United States), we
considered the Funds internal control over financial reporting, including
controls over safeguarding securities, as a basis for designing our auditing
procedures for the purpose of expressing our opinion on the financial
statements and to comply with the requirements of Form N-SAR, but not for
the purpose of expressing an opinion on the effectiveness of the Funds
internal control over financial reporting. Accordingly, we do not express
an opinion on the effectiveness of the Funds internal control over
financial reporting.

The management of the Fund is responsible for establishing and maintaining
effective internal control over financial reporting. In fulfilling this
responsibility, estimates and judgments by management are required to
assess the expected benefits and related costs of controls. A funds
internal control over financial reporting is a process designed to provide
reasonable assurance regarding the reliability of financial reporting and
the preparation of financial statements for external purposes in accordance
with generally accepted accounting principles. A funds internal control
over financial reporting includes those policies and procedures
that (1) pertain to the maintenance of records that, in reasonable detail,
accurately and fairly reflect the transactions and dispositions of the
assets of the fund; (2) provide reasonable assurance that transactions
are recorded as necessary to permit preparation of financial statements
in accordance with generally accepted accounting principles, and that
receipts and expenditures of the fund are being made only in accordance
with authorizations of management and trustees of the fund; and (3) provide
reasonable assurance regarding prevention or timely detection of unauthorized
acquisition, use or disposition of a funds assets that could have a material
effect on the financial statements.

Because of its inherent limitations, internal control over financial
reporting may not prevent or detect misstatements. Also, projections
of any evaluation of effectiveness to future periods are subject to the risk
that controls may become inadequate because of changes in conditions, or that
the degree of compliance with the policies or procedures may deteriorate.

A deficiency in internal control over financial reporting exists when the
design or operation of a control does not allow management or employees,
in the normal course of performing their assigned functions, to prevent
or detect misstatements on a timely basis. A material weakness is a
deficiency, or a combination of deficiencies, in internal control over
financial reporting, such that there is a reasonable possibility that a
material misstatement of the Funds annual or interim financial statements
will not be prevented or detected on a timely basis.

Our consideration of the Funds internal control over financial reporting
was for the limited purpose described in the first paragraph and would not
necessarily disclose all deficiencies in internal control over financial
reporting that might be material weaknesses under standards established
by the Public Company Accounting Oversight Board (United States). However,
we noted no deficiencies in the Funds internal control over financial
reporting and its operation, including controls over safeguarding securities
that we consider to be material weaknesses as defined above as of
October 31, 2017.

This report is intended solely for the information and use of management
and the Board of Trustees of Advent Claymore Convertible Securities and
Income Fund and the Securities and Exchange Commission and is not
intended to be and should not be used by anyone other than
these specified parties.

/s/PricewaterhouseCoopers LLP
New York, New York
December 26, 2017
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</DOCUMENT>
