Rock Island at left of map, Davensport Island rightmost labeled island.; Photocopy.; Relief shown by hachures.; "25th Cong., 2nd sess., Senate Doc. no. 139"--upper right within neat line.; "Courtesy of the Army Corps of Engineers, Rock Island Aresenal, 1/80"--lower right outside neat line. 25 x 85 centimeters Scale approximately 1:800; 1 inch = 16 chains General Map Collection
Use of this item may be governed by US and international copyright laws. You may be able to use this item, but copyright and other considerations may apply. For possible additional information or guidance on your use, please contact the contributing organization.