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Rumsey, David, 1944-. Ross, Lieut.. (2015). Course of the River Mississipi, from the Balise to Fort Chartres; taken on an expedition to the Illinois, in the latter end of the year 1765. By Lieut. (John) Ross of the 34th Regiment: Improved from the surveys of the river made by the French. London printed for Robt. Sayer, no. 53 in Fleet Street, published as the Act directs, 1 June 1775 (Raster Image). [GeoTIFF]. Cartography Associates. https://purl.stanford.edu/rr902tf1084