The two plans showing riverside topography were drawn by Lieutenant T. B. Brown and printed at Imbert's Lithography. The maps were inscribed, folded and sent in the form of a stampless letter by West Point historian Roswell Park to a young Charlemagne Tower in Oneida County, NY, an eventual prominent businessman. The addressed side notes "Models of Topography Oct. 29, 1831" and bears a West Point post-mark.
