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



WAR DEPARTMENT. 



REPORT 



LIEUT. HENRY L. ABBOT, 



CORPS OF TOPOGRAPHICAL ENGINEERS, 



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 TOPOQBAPHIOAL ESQINEER3. 



185 5. 

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