Explorations and Surveys for a Railroad Route From the Mississippi River to the Pacific Ocean, War Department: Routes in California and Oregon Explored by Lieut. R. S. Williamson, Corps of Topographical Engineers, and Lieut. Henry L. Abbot, Corps of Topog: Routes in California and Oregon Explored by Lieut. R. S. Williamson, Corps of Topographical Engineers, and Lieut. Henry L. Abbot, Corps of Topog
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Explorations and Surveys for a Railroad Route From the Mississippi River to the Pacific Ocean, War Department: Routes in California and Oregon Explored by Lieut. R. S. Williamson, Corps of Topographical Engineers, and Lieut. Henry L. Abbot, Corps of Topog: Routes in California and Oregon Explored by Lieut. R. S. Williamson, Corps of Topographical Engineers, and Lieut. Henry L. Abbot, Corps of Topog
