Richd. C. Drum to Jonn W. Davidson, September 5, 1861

Capt. Jonn W. DAVIDSON, First Regiment Dragoons, Commanding Camp Fitzgerald, Cal. : SIR: The general commanding the department has learned with astonishment that you departed from the instructions contained in the letter from these headquarters on the 23d ultimo, wherein you were specially directed to take with you on the expedition authorized one strong company of dragoons. Subsequent to that date an important movement was ordered, and knowing that one of the dragoon companies was still at that point, the two companies of infantry were ordered to Fort Yuma on very important service, thus leaving a sufficient force to protect the public property in camp and at the depot. The strict observance of all instructions and orders is at all times absolutely necessary. Now more than ever is the necessity of this impressed. upon you. Should any evil results attend the noncompliance with orders you have received, you of course perceive that you will be accountable.

Very respectfully, your obedient servant,