LETTER FROM THE SECRETARY OF WAR. 
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eS" We 
Sm: I-have. the honor £ transmit herewith the report of First Lietitens 
topographical engineers, upon the Exploration of the River Colorado of the rat 
accompanying maps, called for by the resolution of the House of re tir 
Ist instant. 
Very respectfully, your obedient servant, 
The PRESIDENT OF THE SENATE. 
