Orme, Robert, -1781, Jefferys, Thomas, -1771, and Robert Sayer. "A map of the country between Will's Creek & Monongahela River shewing the rout and encampments of the English army in 1755." Map. London: Printed for Robert Sayer, .. and Thomas Jefferys, [1768]. Norman B. Leventhal Map & Education Center, https://collections.leventhalmap.org/search/commonwealth:q524mv470 (accessed March 13, 2025).