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Following is a digital file of the Report of Lieut. Henry L. Abbot, Corps of Topographical Engineers upon Explorations for a Railroad Route from the Sacramento Valley to the Columbia River, made by Lieut. R. S. Williamson, Corps of Topographical Engineers, Assisted by Lieut. Henry L. Abbot, Corps of Topographical Engineers. This book was printed in 1855 and is volume six in the serial titled Reports of Explorations and Surveys, to Ascertain the Most Practicable and Economical Route for a Railroad from the Mississippi River to the Pacific Ocean. ; ill.; maps (some col.); Also known as: Pacific railroad surveys; Due to the delicate nature of this antique book and the physical stress created by scanning, only the portions relevant to the Klamath Basin were selected for scanning.

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