A rare, hand-drawn 1790 map of Detroit has been discovered in a family home in Ontario. The framed 21-by-40-inch map is now part of the University of Michigan's William L. Clements Library ...

The 21-by-40 inch map titled "Rough sketch of the King's Domain at Detroit" shows a "specific plan" of the city, its defense bases, Fort Lernoult and plans that never came to fruition.

The map, which measures 21-by-40-inches, was produced about six years before the British evacuated Detroit, making way for U.S. troops. It sketches out the city's defences, including Fort Lernoult.