The below entries are taken from The Mathews Light Va. Artillery, by Jeffery C. Weaver...
FORREST, Cornelius : Enl. on 7/18/61 Mathews CH. Pres. on 4/30/63. Deserted to the enemy on 10/31/64 per 10/31/64 roll. Entered Federal lines at Yorktown. Took oath at Fort Monroe on 10/21/64, described as 5' 10cc", blue eyes, blk hair, res of Mathews Co. Sent to Baltimore, MD.

FORREST, E.C. : Enlisted on 10/9/62 in Henrico Co. Present on all rolls.

FORREST, John S. : Enl on 10/9/62 Henrico Co. Pres on 4/30/64, 10/13/64 & 12/31/64 rolls. Deserted on 1/20/65 per 2/28/65 roll. Entered Federal lines at Yorktown 3/19/65, sent to Provost Marshall at Bermuda Hundred.

FORREST, William J. : Enl on 10/9/62 Henrico Co. Pres on 4/30/64, 10/31/64 & 12/31/64 rolls. Deserted 1/20/65 per 2/28/65 roll. Took oath at Fort Monroe on 1/27/65 (2/14/65), described as 5' 9 3/4", blk eyes & hair, res. of Mathews Co. Sent to Norfolk, Va. on 1/30/65.

The Below entries are taken from the booklet "Mathews Men Who Served in The War Between The States", by Mrs. Bernard Franklin White, July 1961....

John Forrest, Diggs, P.O. Enl July 1861 as a pvt. in Co. E. of the 24th Reg of Va. Vol. Cav. was paroled Apr. 9, 1865.