Gordon, Harry, -1787, Amherst, Jeffery Amherst, Baron, and Royal United Services Institute for Defence and Security Studies. "A SKETCH of FORT DU QUESNE how it was before the Enemy abandont and distryd it taken from a survey of Cap.t Gordon's." Map. Place of production not identified: Producer not identified, [1758]. Norman B. Leventhal Map & Education Center, https://collections.leventhalmap.org/search/commonwealth:hx11z219k (accessed April 18, 2024).