Engraving, hand-colored;19 1/2 x 26 1/4. Published by Andrew Drury, London, 4 November 1776.
The title credits
an actual survey by Benjamin Eas[t]burn, who was Surveyor General of Pennsylvania from 1733 to 1741. In fact the map is based on a survey by Nicholas Scull, Surveyor General from 1748 until 1761.
The inset map, top left, is based on Eastburn.