Incidents of a trip through the great Platte Valley, to the Rocky Mountains and Laramie Plains, in the fall of 1866, with a synoptical statement of the various Pacific railroads, and an account of the great Union Pacific railroad excursion to the one hundreth meridian of longitude (1867)
Seymour, Silas, 1817-1890 · New York, D. Van Nostrand · leaf 10
Union Pacific Railroad · West (U.S.) -- Description and travel
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.