Amherst, Jeffery Amherst, Baron, and Royal United Services Institute for Defence and Security Studies. "[Map showing Fort William Henry, Fort Carillon, Fort St Frederic, and the upper reaches of the Connecticut River]." Map. Place of production not identified: Producer not identified, [ca. 1755]. Norman B. Leventhal Map & Education Center, https://collections.leventhalmap.org/search/commonwealth:hx11z172w (accessed April 25, 2024).