1. A correct map of the United States of North America : including the British and Spanish territories carefully laid down agreeable to the treaty of 1784 Maps University Of Minnesota Public content 1787. Bowen, Thomas, -1790. Prime meridian: London.; Relief shown pictorially.; "English Miles 69 to a Degree."; "Nautical Leagues 20 to a Degree."; At head of map: Engraved f... (London).