Letters from Canada written during a residence there in the years 1806, 1807, and 1808 [microform] : shewing the present state of Canada, its productions, trade, commercial importance and political relations ... exhibiting also the commercial importance of Nova-Scotia, New Brunswick, & Cape-Breton; and their increasing ability, in conjunction with Canada, to furnish the necessary supplies of lumber and provisions to our West-India Islands / by Hugh Gray