A W Whipple’s Route Explored from the Mississippi River to the Pacific Ocean A W Whipple 1853

Catalog Number 50624
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A.W. Whipple

Short Title:

A.W. Whipple’s Route Explored from the Mississippi River to the Pacific Ocean

Full Title:

U.S. Pacific Rail Road Exps & Surveys, War Department. Geological Map of the Route explored by Lieut. A.W.WHIPPLE, Corps of Topl. Engrs. near the Parallel of 35° North Latitude From The Mississippi River to the Pacific Ocean 1853 - 1854. Prepared in the Office of Pacific Rail Road Explorations & Surveys, War Departmt., From the Notes & Collections of the Geologist of the Expedition, Mr. Jules Marcou. By William P. Blake. Lith. By A. Hoen & Co., Balt."


"House of Representatives. 36th Congress, 1st Session. Ex. Doc. No. 56. Reports of Explorations and Surveys, to Ascertain The Most Practicable and Economical Route For a Railroad From the Mississippi River to the Pacific Ocean. Made Under the Directions of the Secretary of War, in 1853-5, According to Acts of Congress of March 3, 1853, May 31, 1854, And August 5, 1854. Volume XII. Book I. Washington: Thomas H. Ford, Printer 1860."  Lieutenant Amiel Weeks Whipple (1816-1863), attached to the US Army Corps of Topographical Engineers, was in charge of this portion of the Pacific Rail Road Exploration for the Department of War, Jefferson Davis being the War Secretary at the time. Baron Friedrich W. von Egloffstein (1824-1885), a Bavarian, was the topographer for the Exploration. Dr. Jules Marcou (1824-1898), the famous French explorer, author and geologist and Sorbonne Professor, was assigned to the Pacific Railroad Expedition as geologist and mining engineer. He returned to France after the Exploration. William P. Blake, an expert on geology of the western United States, who was also part of the Expedition team, prepared the map based upon the team’s research. Secretary Davis demanded that Marcou turn over all field notes and materials prior to leaving the US, which Marcou refused until a second demand arrived in France. Eventually, Blake interpreted and published Marcou’s notes out of the abbreviated French, and then challenged Marcou’s new geological map of the US as being inaccurate. Marcou challenged the American geological community for the next 40 years. A. Hoen & Co. was a well-known printer of government documents throughout the 19th and 20th Centuries, as well as maps for National Geographic during a majority of the 20th.  

Size of Map:

20.1 x 94 cm. approximately (7.875 x 37in.)


This multi-fold map presents the Geological Section from the Mississippi River to the Pacific Ocean. This over-view map is read from left border to right border beginning with the Pacific Ocean, and ending with the Mississippi River. Various hand-colouring is used throughout, with the Legend of said colours found along the bottom border. "Scale statute Miles" is found directly below the Title located in the upper border centre. Map orientation indicates top border facing North. Longitudinal and Latitudinal lines are clearly presented. Map is in English. No Compass Rose is indicated. There is no information on the verso.  


Tooley’s Dictionary of Mapmakers Revised Edition Vol. (A - D), p.147, Vol. (E - J), pp.11, 345, Vol. (K - P), p.205, Vol. (Q - Z), p. 379; De Ford, Ronald K. New Mexico Geological Society;

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