Exemplary work has been done by many deltiologists, particularly those working in concert in such organizations as the Toronto Postcard Club, whose members maintain a database of the Canadian postcards of Valentine and Sons, and Warwick Bros. & Rutter. The work of people like Michael J. Smith in his The Canadian Patriotic Postcard Handbook 1898–1928, or his The W.G. MacFarlane Picture Postcard Handbook 1902–1910, or The Warwick Bros. & Rutter Picture Postcard Handbook 1903–1912, as well as Smith and Angley’s The McCoy Printing Company Picture Postcard Handbook 1900–1910 have advanced the information available on important Canadian postcard publishers.
Here are some links to small samplings of Canadian postcards, or postcards featuring Canadian subjects, from publishers from the late 19th and early 20th centuries.













