Condensed Balance Sheets (USD $)	Jun. 30, 2011	Dec. 31, 2010
ASSETS
Cash and cash equivalents	$ 805,039	$ 668,310	[1]
United States Treasury securities	4,039,117	5,013,272	[1]
Royalties receivable	6,282,003	6,041,224	[1]
Prepaid expenses	50,986	4,519	[1]
TOTAL CURRENT ASSETS	11,177,145	11,727,325	[1]
NONCURRENT ASSETS
United States Treasury securities	5,130,100	3,025,924	[1]
PROPERTIES
Mineral and surface lands	39,304,058	39,127,058	[1]
Less: Allowances for accumulated depletion and amortization	(36,908,377)	(36,614,977)	[1]
MINERAL PROPERTIES, NET	2,395,681	2,512,081	[1]
Building and equipment	313,831	313,831	[1]
Less: Allowances for accumulated depreciation	(211,890)	(196,069)	[1]
PROPERTY, PLANT AND EQUIPMENT, NET, TOTAL	101,941	117,762	[1]
TOTAL PROPERTIES	2,497,622	2,629,843	[1]
TOTAL ASSETS	18,804,867	17,383,092	[1]
LIABILITIES AND BENEFICIARIES' EQUITY
Accounts payable and accrued expenses	140,904	111,556	[1]
Distributions	4,500,000	5,625,000	[1]
TOTAL CURRENT LIABILITIES	4,640,904	5,736,556	[1]
NONCURRENT LIABILITIES
Deferred compensation	181,500	181,500	[1]
Liability for pension benefits	1,432,272	1,349,314	[1]
TOTAL NONCURRENT LIABILITIES	1,613,772	1,530,814	[1]
TOTAL LIABILITIES	6,254,676	7,267,370	[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	14,477,089	12,204,529	[1]
Accumulated other comprehensive loss	(1,926,898)	(2,088,807)	[1]
TOTAL BENEFICIARIES' EQUITY	12,550,191	10,115,722	[1]
TOTAL LIABILITIES AND BENEFICIARIES' EQUITY	$ 18,804,867	$ 17,383,092	[1]

[1] Note: The balance sheet at December 31, 2010, 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.