Henry returned to Fort Michili-Makinak and regained much of the property which he had lost in the Indian attacks.

As some compensation for his former sufferings he received from the British commandant of Michili-Makinak the exclusive fur trade of Lake Superior.
The currency at that period, and long before, in Canadian history, was in beaver skins, which were approximately valued at the price of two shillings and sixpence a pound.

Otter skins were valued at six shillings each, and marten skins at one shilling and sixpence, and others in proportion; but all these things were classed at being worth so many beaver skins or proportion of beaver skins.

Thus, for example, the native canoemen and porters engaged by Henry for his winter hunts were paid each at the rate of a hundred pounds weight of beaver skins.[9] [Footnote 9: The smallest change, so to speak, was the skin of a marten, worth one shilling and sixpence.

If you went to a canteen for a drink you paid your score with a marten skin, unless the value of your refreshment exceeded the sum of eighteen pence.] At various places on the River Ontonagan, which flows into Lake Superior, Henry was shown the extraordinary deposits of copper, which presented itself to the eye in masses of various weight.