Faden, William. "The course of Delaware River from Philadelphia to Chester, exhibiting the several works erected by the rebels to defend its passage, with the attacks made upon them by His Majesty's land & sea forces." Map. London: s.n., 1778. Norman B. Leventhal Map & Education Center, https://collections.leventhalmap.org/search/commonwealth:6w924q14k (accessed April 19, 2024).