Bruce, Robert George, Amherst, Jeffery Amherst, Baron, and Royal United Services Institute for Defence and Security Studies. "PLAN and SECTIONS of the Front of the Projected Hornwork at FORT CUMBERLAND with CASEMATES Proposed in the Curtain Capable of Containing 800 Men &c." Map. Fort Cumberland?: R. G. Bruce,, 1761. Norman B. Leventhal Map & Education Center, https://collections.leventhalmap.org/search/commonwealth:hx11z0020 (accessed April 23, 2024).