Condensed Balance Sheets (USD $)	Jun. 30, 2012	Dec. 31, 2011
CURRENT ASSETS
Cash and cash equivalents	$ 628,170	$ 750,947	[1]
United States Treasury securities	6,982,293	5,108,307	[1]
Royalties receivable	7,036,146	7,912,289	[1]
Prepaid expenses	51,174	2,110	[1]
TOTAL CURRENT ASSETS	14,697,783	13,773,653	[1]
NONCURRENT ASSETS
United States Treasury securities	4,842,162	4,759,072	[1]
PROPERTIES
Mineral and surface lands	39,479,708	39,479,708	[1]
Less: Allowances for accumulated depletion and amortization	(37,549,777)	(37,201,777)	[1]
Mineral and surface lands, net	1,929,931	2,277,931	[1]
Building and equipment	316,816	316,816	[1]
Less: Allowances for accumulated depreciation	(229,480)	(212,560)	[1]
Building and equipment, net	87,336	104,256	[1]
TOTAL PROPERTIES	2,017,267	2,382,187	[1]
TOTAL ASSETS	21,557,212	20,914,912	[1]
CURRENT LIABILITIES
Accounts payable and accrued expenses	178,268	128,856	[1]
Distributions	4,500,000	8,625,000	[1]
TOTAL CURRENT LIABILITIES	4,678,268	8,753,856	[1]
NONCURRENT LIABILITIES
Deferred compensation	209,600	209,600	[1]
Liability for pension benefits	1,732,377	1,642,113	[1]
TOTAL NONCURRENT LIABILITIES	1,941,977	1,851,713	[1]
TOTAL LIABILITIES	6,620,245	10,605,569	[1]
BENEFICIARIES' EQUITY, including certificate holders' equity, represented by 1,500,000 certificates (shares or units) of beneficial interest authorized and outstanding, and the reversionary interest	17,125,034	12,752,340	[1]
Accumulated other comprehensive loss	(2,188,067)	(2,442,997)	[1]
TOTAL BENEFICIARIES' EQUITY	14,936,967	10,309,343	[1]
TOTAL LIABILITIES AND BENEFICIARIES' EQUITY	$ 21,557,212	$ 20,914,912	[1]

[1] The balance sheet at December 31, 2011, has been derived from the audited financial statements at that date but does not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements.