Richd. Drum to R. E. DE Russy, January 9, 1862

Lieut. Col. R. E. DE Russy, Engineer Corps, San Francisco, Cal. :

COLONEL: Desiring to address a communication to the Governor of this State on the subject of erecting field-works to guard the approaches to the city at as early a day as practicable, the general commanding the department wishes to know whether you have completed your reconnaissance for this purpose. Should the Legislature at its present session take any steps in the matter, the general designs furnishing the

State authorities all the information on the subject in his possession. The general requests you to suggest the amount of money which would probably be required to place such works as you may think proper to recommend in readiness for receiving their armament, based on the supposition that the greater portion of the labor will be performed by the troops. :

Very respectfully, your obedient servant,