Canada advertising stamp covers. This collection contains 4 covers. Included are 1- The Gowdy Mfg. Co., Guelph, Ontario. The stamp is a 3 cent Victoria small queen, with a clear Guelph, Ontario circle cancel, cancelled 1893. Has a clear Barrie, Ontario address. 1- Russell House, Rat Portage, Ontario. The stamp is a 3 cent Victoria small queen, with a fairly faint cancel mark, cancelled 1893. Has a clear Toronto, Ontario address. 1- WM. Watson, Jr., Carriage Maker and Undertaker, Priceville, Ontario. The stamp is a 3 cent Victoria small queen, with a clear and distinct Priceville, Ontario circle cancel, cancelled 1897. Has a clear Durham, Ontario address. 1- The London Show Company, London, Ontario. The stamp is a 3 cent Victoria small queen, with a 3-ringed London circle cancel, cancelled 1896. Has a clear and distinct Amherstburg, Ontario address.