A letter to the Right Honourable the Earl of Durham, K.G.B., lord high commissioner and governor in chief of Her Majesty's North American possessions, &c. &c. & c : calling His Lordship's attention to the advantages to be derived by allowing a free transit of merchandise through Canada to the state of Michigan and Wisconsin Territory, as a means of preserving our friendly relations with the United States, with observations as to the river St. Lawrence, for extending the commerce of the empire and enriching the Canadas / by James Buchanan.