A letter to the right honorable 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, Esq. her Majesty's consul for the state of New-York.