From the National Archives, RG 109, Ch. 6, Vol. 707-709; “Letters Received and Sent, Chimborazo Hospital. 1861-64.” 3 Vols: Vol. 707. p. 228

Medical Directors Office 213 Main
Richmond Dec. 11/1862

Sir:

You are respectfully instructed to make arrangements to receive immediately the sick and wounded of Howard’s Grove Hospital – about 300 in number.

By Order Med. Director
Yr. Obt. Servt
A. S. Mason Surgeon

Surg. J. B. McCaw
    in charge
         Chimborazo Hospital