Relief shown by hachures. Also shows northern part of Illinois. "Published ... under the superintendance of the Society for the Diffusion of useful knowledge ..." Probably detached from Society for the Diffusion of Useful Knowledge. Maps of the Society for the Diffusion of Useful Knowledge. -- London: C. Knight, 1846-1851. -- Vol. 2, no. 134. 1 map: color; 29 x 37 cm