Condensed Statements of Operations - USD ($)	3 Months Ended		6 Months Ended
	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2016	Jul. 31, 2015
Revenues
Royalty income	$ 2,608,619	$ 2,732,892	$ 2,608,619	$ 4,048,845
Interest income	1,017	2,469	2,696	4,525
Total revenues	2,609,636	2,735,361	2,611,315	4,053,370
EXPENSES	189,389	251,717	621,320	629,460
Net income	$ 2,420,247	$ 2,483,644	$ 1,989,995	$ 3,423,910
Number of units outstanding	13,120,010	13,120,010	13,120,010	13,120,010
Net income per unit (Note 2) (in dollars per unit)	$ 0.1845	$ 0.1893	$ 0.1517	$ 0.2610
Distributions declared per unit (Note 3) (in dollars per unit)	$ 0.2000	$ 0.0400	$ 0.4000	$ 0.0400