10.Title: "Milk R. to the Crossing of the Columbia R.: Routes Near the 47th and 49th Parallels"Catalog Id:
A topographic survey map depicting the Northwest and Central Mountain area roughly between Fort Benton (Montana) to the East, Fort Walla Walla (Washington) to the West and South, and Fort Colville to the North. The cartographic survey, which was lead by Isaac I. Stevens, was commissioned by the U.S. Government, War Department, for the purpose of locating a western pacific, railroad route across the Rocky and Cascade Mountains. This is one of a series of survey maps. Specific survey routes dating from 1853-1855 (including: Lt. Mullan, Gov. Stevens, J. Lambert, A. W. Tinkham, Mr. Doty, Lt. Donelson, R. H. Lansdale, F. W. Lander, J. M. Stanley, Lt. Arnold, and Lt. Saxton) are identified. The main route taken by Stevens is indicated in a solid, black line. Broken lines identify alternate survey routes. Forts, towns, missions, and major geographic features (such as mountains, plains, rivers, and lakes) are identified.