HEADQUARTERS COLUMN FROM CALIFORNIA, July 8, 1862

Tucson, Ariz., July 8, 1862.

First Infantry California Vols., Comdg. at Tucson, Ariz.: COLONEL: You will order a sergeant and nine trusty infantry soldiers and three first-rate cavalry soldiers to the crossing of the San Pedro, to guard some forage which the quartermaster will send to that

CHAP.LXIT.] EXPEDITION TO N. W. TEXAS AND NEW MEXICO. 99

point. You will order Roberts’ company, of the First Infantry California Volunteers, to the San Simon, en route to the Rio Grande, where they will make an intrenched camp, if possible near the mail station, and there await further orders. A train will accompany these troops with thirty days’ rations for Colonel Eyre’s command, commencing on its arrival af the San Simon, and thirty days’ for the troops who are to remain at the San Pedro. Hach soldier will have 110 rounds of ammunition, and the party at the San Simon will have some intrenching tools and also some seythes. These troops are sent to guard these supplies until the column reaches them on its march to the Rio Grande. They also go to observe the road and to form a support to Colonel Eyre in case he falls back. You cannot be too minute in your instructions to them, having in view the furtherance of these ends. They are to have scouts all the time well to the front, unless menaced, say fifty or more miles; they are to keep me informed of movements in their vicinity of the enemy, and if attacked they are not to surrender on any terms. They are to be uncommonly watchful that Indians do not run off their stock, and at the same time are not to attack the Indians unless the latter are the aggressors. I am, colonel, respectfully, JAMES H. CARLETON, Brigadier-General, U. S. Army, Commanding.