EXPLORATIONS AXD SURVEYS FOR A RAILROAD ROUTE FROM THE MISSISSIPPI RIVER TO THE PACIFIC OCEAN. 



WAR DEPARTMENT. 



REPORT 



LIEUT. HENRY L. ABBOT, 



CORPS OF TOPOGRAPHICAL ENGINEERS, 



UPON 



EXPLORATIONS FOR A RAILROAD ROUTE, 



THE SACRAMENTO VALLEY TO THE COLUMBIA RIVER, 



LTEUT. R. S. WILLIAMSON, 



CORPS OF TOPOGRAPHICAL ENGINEERS, 



ASSISTED BY 



LIEUT. HENRY L. ABBOT, 



CORPS OF TOPOGRAPHICAL ENGINEERS. 



1855, 

 1 d 



