Richd. C. Drum to James H. Carleton, May 28, 1862

Col. JAMES H. CARLETON, First Infantry California Vols., Comdg. Column from California: Sir: In reply to your letter of the 13th instant, the general commanding the department directs me to inform you that there is no evidence at these headquarters of any authority having been granted, either by treaty or otherwise, on the part of the Mexican Republic for the passage of troops through her territory. Should the contingency alluded to in a former letter arise, the instructions therein given will be your guide. The general directs me to say that your letters to Lieutenant-Colonel West have been carefully perused and receive bis approval.

Very respectfully, your obedient servant,