This looks like him:

George Washington Libby

Residence New Kent County VA;
Enlisted on 4/19/1861 at Richmond, VA as a Sergeant.
On 4/19/1861 he mustered into "G" Co. VA 12th Infantry
He was discharged for disability on 11/23/1861
On 3/22/1862 he mustered into "A" Co. VA 13th Battn Light Artillery
* Detailed 11/22/1862 Howard's Grove Hospital, Richmond, VA (As clerk)
* Hospitalized 8/5/1864 Richmond, VA
* Hospitalized 8/11/1864 Howard's Grove Hospital, Richmond, VA (With scabies & hernia)
* Returned 12/1/1864 (place not stated)
* Oath Allegiance 4/14/1865 Richmond, VA
Promotions:
* 1st Sergt 9/15/1861 (As of Co. G, 12th VA Inf)
* Sergt 3/22/1862 (As of Co. A, 13th Battn LA)
VA 1st Infantry (Also served in 1861)
Other Information:
born in 1839 in Richmond, VA
died 9/3/1931
Buried: Hollywood Cemetery, Richmond, VA
(Postwar, Merchant. moved to Tennessee in 1866. Member
of Klu Klux Klan. Attended Otey Battalion Reunion,
Richmond, VA 1887.)

Sources used by Historical Data Systems, Inc.:
- The Virginia Regimental Histories Series

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The 1860 Richmond City Directory lists a
Libby, George W Feed Store h 513 n 30th

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Libby Prison

The prison was located in a three-story brick warehouse on two levels on Tobacco Row at the waterfront of the James River. Prior to use as a jail, the warehouse had been leased by Capt. Luther Libby and his son George W. Libby. They operated a ship's chandlery and grocery business
https://en.wikipedia.org/wiki/Libby_Prison

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Find A Grave Memorial # 6018980