The collection contains business correspondence, including letters to William Grant and Grant, Campion & Co. from Brickwood, Pattle, & Co., 1792-1793, and letters from Brickwood & Daniell, John Blackwood, and McTavish, Fraser and Co., 1799-1800. There is also a bound letter book for Grant and Laframboise, Montreal, 1800-1801 with additional loose leaves of letter copies dating between 1798 and 1800.