Condensed Balance Sheets (USD $)	Sep. 30, 2012	Dec. 31, 2011
CURRENT ASSETS
Cash and cash equivalents	$ 858,619	$ 750,947	[1]
United States Treasury securities	9,332,633	5,108,307	[1]
Royalties receivable	4,907,858	7,912,289	[1]
Prepaid expenses	29,707	2,110	[1]
TOTAL CURRENT ASSETS	15,128,817	13,773,653	[1]
NONCURRENT ASSETS
United States Treasury securities	3,774,606	4,759,072	[1]
PROPERTIES
Mineral and surface lands	39,479,708	39,479,708	[1]
Less: Allowances for accumulated depletion and amortization	(37,723,777)	(37,201,777)	[1]
Mineral and surface lands, net	1,755,931	2,277,931	[1]
Building and equipment	316,816	316,816	[1]
Less: Allowances for accumulated depreciation	(237,940)	(212,560)	[1]
Building and equipment, net	78,876	104,256	[1]
TOTAL PROPERTIES	1,834,807	2,382,187	[1]
TOTAL ASSETS	20,738,230	20,914,912	[1]
CURRENT LIABILITIES
Accounts payable and accrued expenses	219,356	128,856	[1]
Distributions	5,250,000	8,625,000	[1]
TOTAL CURRENT LIABILITIES	5,469,356	8,753,856	[1]
NONCURRENT LIABILITIES
Deferred compensation	209,600	209,600	[1]
Liability for pension benefits	977,590	1,642,113	[1]
TOTAL NONCURRENT LIABILITIES	1,187,190	1,851,713	[1]
TOTAL LIABILITIES	6,656,546	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	16,142,286	12,752,340	[1]
Accumulated other comprehensive loss	(2,060,602)	(2,442,997)	[1]
TOTAL BENEFICIARIES' EQUITY	14,081,684	10,309,343	[1]
TOTAL LIABILITIES AND BENEFICIARIES' EQUITY	$ 20,738,230	$ 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.