Description: Geographical section from the Rio Grande River and Red River from 1855-1861. Printed in the upper left-hand corner of the map is, "US Pacific RailRoad Exploration & Survey War Department. Geological Section, Along the route explored by Capt. Jno Pope Corps of Topl. Engrs., Near the 32 Parallell of North Latitude. 1854. From the Rio Grande to the Red River. Prepared in the Office of Pacific RailRoad Exploration & Survey War Dep! By William P. Blake."
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Partner: University of Texas at Arlington Library