Cheevers, J. (John), and Thomas Hutchins. "A new map of the western parts of Virginia, Pennsylvania, Maryland and North Carolina; comprehending the river Ohio, and all the rivers, which fall into it; part of the river Mississippi, the whole of the Illinois River, Lake Erie; part of the lakes Huron, Michigan &c. and all the country bordering on these lakes and rivers." Map. London: T. Hutchins, November 1, 1778. Norman B. Leventhal Map & Education Center, https://collections.leventhalmap.org/search/commonwealth-oai:rx917m72v (accessed June 10, 2024).