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3 
EXPLORATIONS AND SURVEYS FOR A RAILROAD ROUTE FROM THE MISSISSIPPI RIVER TO THE PACIFIC 
OCEAN.—WAR DEPARTMENT. 
MEMOIR 
TO ACCOMPANY THE 
MAP OF THE TERRITORY OF THE UNITED STATES 
FROM THE 
MISSISSIPPI RIVER TO THE PACIFIC OCEAN, 
GIVING 
A BRIEF ACCOUNT OF EACH OF THE EXPLORING EXPEDITIONS SINCE A. D. 1800, WITH A DETAILED DE- 
SCRIPTION OF THE METHOD ADOPTED IN COMPILING THE GENERAL MAP. 
LIEUT. GOUVERNEUR K. WARREN, 
CORPS OF TOPOGRAPHICAL ENGINEERS, U. S. A. 
1859. 
