James H. Carleton to R. C. Drum, May 14, 1862

Maj. R. C. DRUM, Assistant Adjutant-General, U. S. Army, San Francisco, Cal.: MAJOR: If it shall prove that Pesqueira has made any bargains with an agent of the Confederate States to join the Southern Confederacy with the State of Sonora, I respectfully submit if it would not be a kind act to Mexico, now that she is embarrassed by her complications with the allied powers of Europe, to seize Sonora and hold it in good faith in trust for our neighbor, to be given up whenever the Central Government of Mexico claims it. Ethically we have the right, and I doubt very much if it is not our duty to do this. I am, major,

very respectfully, your obedient servant,