HEADQUARTERS OF THE ARMY, August 16, 1861

Washington, August 16, 1861.

Brig. Gen. E. V. SUMNER, U. S. Army, San Francisco, Cal. :

You are to command an expedition into Texas, via Mazatlan, to be composed of two batteries and ten foot companies of regulars, one regiment of volunteer cavalry, and four regiments volunteer infantry. Brig. Gen. J. W. Denver will be associated with you, and take with you Capt. R. L. Ogden, assistant quartermaster. A requisition has been made on the Governor for the volunteers. Communicate with him. Particulars by mail.

(Telegraph to outer station, thence by pony express and telegraph.)