DCHP-1 Online
Free Man's Tariff Fur Trade, Hist. 
See quote.
See also: free trader (def. 1)
- 1907 The barter tariffs at each of the posts was made out in two columns, i.e., Indian Tariff and Free Man's Tariff. Say, for example, a pound of English tobacco was bartered to the Indian at the posts for one dollar a pound, the [H.B.Co.-approved] Free Trader would get it in his outfit for 75 cents. . . .
- 1907 The barter tariffs at each of the posts was made out in two columns, i.e., Indian Tariff and Free Man's Tariff. Say, for example, a pound of English tobacco was bartered to the Indian at the posts for one dollar a pound, the [H.B.Co.-approved] Free Trader would get it in his outfit for 75 cents. . . .