| 1 | A map of the sources of the Colorado & Big Salt Lake, Platte, Yellowstone, Muscle-Shell, Missouri & Salmon & Snake Rivers, branches of the Columbia River |
| 2 | A new map of Texas, Oregon, and California : with the regions adjoining / compiled from the most recent authorities |
| 3 | A new map of the state of California, the territories of Oregon, Washington, Utah & New Mexico |
| 4 | Bancroft's map of California, Nevada, Utah and Arizona |
| 5 | Country drained by the Mississippi western section |
| 6 | Explorations and surveys for a rail road route from the Mississippi River to the Pacific Ocean ... Route near the 47th and 49th parallels / from explorations and surveys made under the direction of the Hon. Jefferson Davis, Secretary of War, by Isaac I. Stevens, Governor of Washington Territory, 1853-4. Map no. 3 Rocky Mountains to Puget Sound |
| 7 | Explorations and surveys for a rail road route from the Mississippi River to the Pacific Ocean ... Route near the 47th and 49th parallels / from explorations and surveys made under the direction of the Hon. Jefferson Davis, Secretary of War, by Isaac I. Stevens, Governor of Washington Territory, 1853-4 |
| 8 | Explorations and surveys for a rail road route from the Mississippi River to the Pacific Ocean, route near the 38th & 39th parallels / from explorations and surveys made under the direction of the Hon. Jefferson Davis, Secretary of War, Capt. J. W. Gunnison, Top. Eng. assisted by Capt. E. G. Beckwith, 3d artillery : E. W. Egloffstein, topographer for the route |
| 9 | Explorations and surveys for a rail road route from the Mississippi River to the Pacific Ocean, route near the 38th & 39th parallels [electronic resource] / from explorations and surveys made under the direction of the Hon. Jefferson Davis, Secretary of War, by Capt. J. W. Gunnison, Top. Eng., assisted by E. G. Beckwith, 3d artillery : F. W. Egloffstein, topographer for the route |
| 10 | Explorations and surveys for a rail road route from the Mississippi River to the Pacific Ocean, route near the 41st parallel / from explorations and surveys made under the direction of the Hon. Jefferson Davis, Secretary of War, by Capt. E. G. Beckwith, 3d artillery : E. W. Egloffstein, topographer for the route |
| 11 | Great Salt Lake City surveys / platted for Cap. Richard F. Burton by Thomas Bullock |
| 12 | Johnson's California, with Utah, Nevada, Colorado, New Mexico and Arizona / published by Johnson and Ward |
| 13 | Karte zu Balduin Mollhausen's Reise vom Mississippi nach der Kusten der Sudsee im Jahre 1853-1854 / entworfen und gezeichnet von Dr. Henry Lange |
| 14 | Map exhibiting the lines of march passed over by the troops of the United States : during the year ending June 30th 1858 / prepared by Order of the Hon. J.B. Floyd, Sec. War Dept., Office Expl. & Survey |
| 15 | Map exhibiting the routes between Fort Dalles and the Great Salt Lake |
| 16 | Map of a reconnoisance between Fort Leavenworth on the Missouri river and the Great Salt Lake in the territory of Utah, made in 1849 and 1850, under the orders of Col. J.J. Abert ... by Capt. Howard Stansbury |
| 17 | Map of an exploring expedition to the Rocky Mountains in the year 1842 and to Oregon & North California in the years 1843-44 / by Brevet Capt. J.C. Fremont, of the Corps of Topographical Engineers under the orders of Col. J.J. Abert, Chief of the Topographical Bureau |
| 18 | Map of explorations and surveys in New Mexico and Utah / made under the direction of the secretary of war by J.N. Macomb Topi. Engrs. ; assisted by C.H. Dimmock C. Engr., 1860 |
| 19 | Map of Lewis & Clark's treck across the western portion of North America |
| 20 | Map of Oregon Territory |
