Surveys for a future water supply , Map showing proposed lines of aqueducts from the Delaware and Lehigh Rivers and Perkiomen Creek, also available watersheds of the Neshaminy, Tohickon, Mill, and Perkiomen Creeks, and of certain tributaries of the Delaware and Lehigh Rivers north of the Blue Mountains

Public domain image of the vintage map from NYPL Lionel Pincus and Princess Firyal Map Division, free to use, no copyright restrictions image. The Lionel Pincus and Princess Firyal Map Division is one of the world’s premier map collections in terms of size, scope, unique holdings, diversity, and intensity of use. Established in 1898, our holdings include more than 433,000 sheet maps and 20,000 books and atlases - Picryl description