Map of US showing east coast including Canada. Copper plate. Non contemporary color. No 826 on plate. 14" x 9 1/2". Cartographer: Bonne. In 1773, Rigobert Bonne (1727-1795) was appointed Royal Cartographer to France in the office of the Hydrographer at the Depot de la Marine.  His attention to detail and accuracy along with his practical aesthetics were a departure from the decorative and artistic cartography of the 17thand early 18thcentury and made him one of the most important map makers of the modern era.