1. Iowa [map]. Maps University Of Minnesota Public content 1855. J.H. Colton & Co. Hand colored. 37 x 43 centimeters Scale approximately 1:1,452,680 General Map Collection. J.H. Colton & Co. (New York).
2. Nebraska and Kansas. Maps University Of Minnesota Public content 1855. J.H. Colton & Co. (W 113°--W 90°/N 49°--N 32°). Relief shown by hachures. Covers Nebraska extending to the Canadian border and westward to Oregon and Kansas incl... J.H. Colton & Co. (New York).