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Condensed Balance Sheets (USD $)
Jul. 31, 2012
Jan. 31, 2012
Assets    
Cash and cash equivalents $ 8,862,821 $ 10,253,474
U.S. Government securities, at amortized cost (which approximates market) 82,940  
Accrued income receivable 5,116,862 387,980
Prepaid expenses 15,929 53,767
Current assets 14,078,552 10,695,221
U.S. Government securities, at amortized cost (which approximates market) 460,961 473,816
Fixed property, including intangibles, at nominal values    
Amended Assignment of Peters Lease 1 1
Assignment of Cloquet Lease 1 1
Certificate of beneficial interest for 13,120,010 units of land trust 1 1
TOTAL FIXED PROPERTY, including intangibles, at nominal values 3 3
Total assets 14,539,516 11,169,040
Liabilities    
Distribution payable 8,396,806 9,971,208
Accrued expenses 117,628 166,321
Total liabilities 8,514,434 10,137,529
Unallocated Reserve (Note 4) 6,025,079 1,031,508
Trust Corpus 3 3
Total Liabilities, unallocated reserve and trust corpus $ 14,539,516 $ 11,169,040