Explorations and surveys for a rail road route from the Mississippi River to the Pacific Ocean, War Department : profiles from explorations and surveys made under the direction of the Hon. Jefferson Davis, secretary of war : no. 1 route near the 41st parallel from Ft. Bridger to Ft. Reading / by E.G. Beckwith. No 2. route near the 38th and 39th parallel from Westport to Sevier River