Plano de Philadelphia.
Scale ca. 1:220,000. Manuscript, pen and ink. Copied from Joshua Fishers' "To the merchants & insurers of the city of Philadelphia, this chart of Delaware Bay and river." Depths shown in fathoms. Oriented with north to the right. Shows shipping channels. LC Maps of North America, 1750-1789, 1353 Available also through the Library of Congress Web site as a raster image. Vault AACR2