CDV USMC Officers Seated - One Identified as 2nd Lt. Young.  The identification come on page 237 courtesy of The Civil War Uniforms of the United States Marine Corps: The Regulations of 1859.  Charles Cureton, and David Sullivan.

From a Marine-Navy collection.  Identified to 2nd Lt. James M.T. Young, USMC, seated with another officer. Photograph (negative) taken by Alexander Gardner, published by Philip & Solomons, Washington, D.C.  The other markings on the back may be Osborne Dead Letter Officer lot.

Trimmed at top, otherwise a fine image.