Letter to the Secretary of War, Transmitting, in Answer to a Resolution of the Senate of the 6th Instant, the Report and Maps of Captain John Mullan, United States Army, of His Operation While Engaged in the Construction of a Military Road from Fort Walla-Walla, on the Columbia River, to Fort Benson, on the Missouri River. February 19, 1863. -- Read, Ordered to Lie on the Table, and be Printed
