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United States. War Department

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Profiles of the main routes surveyed, compiled in 1855, by Lieutenants G.K. Warren & H.L. Abbot, Corps Topl. Engineers; with revisions and additional compilations from the results of subsequent examinations and surveys. Prepared in the Office of Pacific Rail Road Explorations and Surveys. Captain A.A. Humphreys, Corps Topl. Engineers, in charge, by direction of Hon. Jefferson Davis, Secretary of War. 1856.
Profiles of the main routes surveyed, compiled in 1855, by Lieutenants G.K. Warren & H.L. Abbot, Corps Topl. Engineers; with revisions and additional compilations from the results of subsequent examinations and surveys. Prepared in the Office of Pacific Rail Road Explorations and Surveys. Captain A.A. Humphreys, Corps Topl. Engineers, in charge, by direction of Hon. Jefferson Davis, Secretary of War. 1856.

Route near the 32nd Parallel and coast route Cal. profiles from San Francisco Bay to Los Angeles Cala. and from the Pimas Villages to Fort Fillmore; from Explorations and Surveys made under the direction of The Hon. Jefferson Davis, Secretary of War
Route near the 32nd Parallel and coast route Cal. profiles from San Francisco Bay to Los Angeles Cala. and from the Pimas Villages to Fort Fillmore; from Explorations and Surveys made under the direction of The Hon. Jefferson Davis, Secretary of War

Routes near the 47th and 49th Parallels: profiles; from Explorations and Surveys made under the direction of The Hon. Jefferson Davis, Secretary of War
Routes near the 47th and 49th Parallels: profiles; from Explorations and Surveys made under the direction of The Hon. Jefferson Davis, Secretary of War

Routes in Oregon and California. Profiles sheet no. 1: Brom Benicia to Fort Reading and from Fort Reading to Vancouver; from Explorations and Surveys made under the direction of The Hon. Jefferson Davis, Secretary of War
Routes in Oregon and California. Profiles sheet no. 1: Brom Benicia to Fort Reading and from Fort Reading to Vancouver; from Explorations and Surveys made under the direction of The Hon. Jefferson Davis, Secretary of War

Routes in Oregon and California. Profiles sheet no. 2: from the head of the Des Chutes Valley to Vancouver and from Vancouver to Fort Reading; from Explorations and Surveys made under the direction of The Hon. Jefferson Davis, Secretary of War
Routes in Oregon and California. Profiles sheet no. 2: from the head of the Des Chutes Valley to Vancouver and from Vancouver to Fort Reading; from Explorations and Surveys made under the direction of The Hon. Jefferson Davis, Secretary of War

Route near the 35th Parallel: general profile from Fort Smith, Arkansas to Martinez, near San Francisco, California; from Explorations and Surveys made under the direction of The Hon. Jefferson Davis, Secretary of War
Route near the 35th Parallel: general profile from Fort Smith, Arkansas to Martinez, near San Francisco, California; from Explorations and Surveys made under the direction of The Hon. Jefferson Davis, Secretary of War

Routes in California to connect with the routes near the 32nd and 35th Parallels. Sheet no. 1: profiles of passes in the Sierra Nevada; from Explorations and Surveys made under the direction of The Hon. Jefferson Davis, Secretary of War
Routes in California to connect with the routes near the 32nd and 35th Parallels. Sheet no. 1: profiles of passes in the Sierra Nevada; from Explorations and Surveys made under the direction of The Hon. Jefferson Davis, Secretary of War

Routes in California to connect with the routes near the 32nd and 35th Parallels. Sheet no. 2: profiles of passes in the Sierra Nevada; from Explorations and Surveys made under the direction of The Hon. Jefferson Davis, Secretary of War
Routes in California to connect with the routes near the 32nd and 35th Parallels. Sheet no. 2: profiles of passes in the Sierra Nevada; from Explorations and Surveys made under the direction of The Hon. Jefferson Davis, Secretary of War

Topographic Drafting, prepared under direction of the Chief of Engineers
Topographic Drafting, prepared under direction of the Chief of Engineers

Elementary Map and Aerial Photograph Reading
Elementary Map and Aerial Photograph Reading