EXPLORATIONS AND SURVEYS FOR A RAILROAD ROUTE FROM THE MISSISSIPPI RIVER TO THE PACIFIC OCEAN. 
WAR DEPARTMENT. 
ROUTE NEAR THE FORTY-SEVENTH AND FORTY-NINTH PARALLELS, EXPLORED BY I. I. STEVENS, 
GOVERNOR OF WASHINGTON TERRITORY, IN 1853- 55. 
ZOOLOGICAL REPORT. 
WASHINGTON, D. 0 
1 8 6 9 . 
