Shows routes surveyed and reconnoitred by F.W. Lander, J.F. Mullowney, J.H. Ingle, B.F. Ficklin, ..., At head of title: Department of the Interior, Pacific Wagon Roads., Relief shown by hachures and spot heights., Shows route of Lander Cut-off between South Pass, Wyoming and City of Rocks, Idaho., Covers territory bounded by Snake River, Wind River Mountains, and Great Salt Lake., From the Department of the Interior's Pacific wagon roads, 1859., Sen. Ex. Doc. no. 36 ; Ho. Ex. Doc. no. 108, 2nd sess. 35. Cong.