Richd. C. Drum, September 2, 1861

Fourth Infantry, Commanding at San Bernardino, Cal.:

SIR: I am directed by the general commanding the department to inform you that necessity has compelled the withdrawal of two companies of infantry at Los Angeles for service at Fort Yuma. The squadron of dragoons still at that point will, the general hopes, enable you to sustain the authority of the Government and protect the public property. i

Very respectfully, your obedient servant,