A detailed and cleanly drawn map of New York and Upper Canada, issued by the Society for the Diffusion of Useful Knowledge (SDUK). This wonderful English enterprise was devoted to the spreading of up-to-date information and the enhancing of understanding. This map shows southern Ontario, most of New York, and parts of Pennsylvania, Michigan and Ohio. Rivers, roads and canals are given much attention. The excellent detail and precise engraving is typical of the Society’s work.