Source: LC Maps of North America, 1750-1789, 834. Library of Congress, Geography and Map Division. [Digital ID: g3734d ar083400]
The above Plan is a Discription of a Newtownship Called RoyalsBorough in the County of Cumberland, Bounded South Easterly on the Head Line of Brunswick, Southwesterly on Northyarmouth, Northwesterly on proprietors Land, North-Easterly on Androscoggin River ... Attest Joseph Noyes, Survayer. Datd falmouth, May 22nd 1766.Royalborough was part of the Pejepscot Purchase, incorporated in 1789 as the town of Durham.