Statements of Income - USD ($)	3 Months Ended		6 Months Ended
	Jul. 31, 2019	Jul. 31, 2018	Jul. 31, 2019	Jul. 31, 2018
REVENUES
Royalty income	$ 14,301,838	$ 19,125,069	$ 19,663,627	$ 25,771,739
Interest	42,386	26,883	147,469	64,260
Total revenues	14,344,224	19,151,952	19,811,096	25,835,999
EXPENSES
Expenses	432,537	280,497	989,121	648,696
Net income	$ 13,911,687	$ 18,871,455	$ 18,821,975	$ 25,187,303
WEIGHTED AVERAGE 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)	$ 1.0603	$ 1.4384	$ 1.4346	$ 1.9198
Distribution declared per unit (Note 3) (in dollars per unit)	$ 0.2100	$ 0.2200	$ 1.1000	$ 0.6700