EXPLOBATIONS AND SURVEYS FOR A RAILROAD ROUTE FROM THE MISSISSIPPI RIVER TO THE PACIFIC OCEAN. 
WAR DEPARTMENT. 
REPORT 
EXPLORATIONS IN CALIFORNIA FOR RAILROAD ROUTES 
TO CONNECT WITH 
THE ROUTES NEAR THE 85TH AND 32D PARALLELS OF NORTH LATITUDE. 
LIEUTENANT R. S. WILLIAMSON, 
OORP9 OP TOPOGRAPHICAL ENGINEERS. 
