18 miles to to an inch. Includes legend. At head of title: (No. 1). "Surveyor General's Office, Dubuque, October 13th, 1857, Warner Lewis, Surr. Genl." Sen. Ex. Doc. No. 11 and House Ex. Doc. No. 2, 1st Sess., 35th Cong.
51 x 60 centimeters
Scale approximately 1:1,140,480. 18 miles to to an inch
General Map Collection