“Can anybody tell me why he was not listed?”

As I noted before, he most likely enlisted and later dropped from the rolls during one of the periods in which bi-monthly muster rolls for Company H are missing from the records. See below for the rolls which survived to be incorporated in the Compiled Service Records.

It would appear that he enlisted at the age of 15. I would hazard a guess that when his age was revealed, he was discharged as a non-conscript and dropped from the rolls.

It would seem likely that Vernon was dropped from the rolls by August 1864 as he does not appear at the Sept. & Oct., 1864 muster.

……..

Bi-monthly Muster rolls for Company A, Cavalry Battalion, Waul’s Texas Legion

Note, missing rolls indicated in brackets

Organization to June 30, 1862, Stationed at Camp Wauls
First Muster to Aug. 31,1862, Station not stated
Sept. & Oct., 1862, Stationed at Cold Water
[Nov. & Dec., 1862]
Jany & Feby, 1863, Stationed at Camp near Vicksburg, AKA
[Mar. & Apr., 1863]
[May & Jun., 1863]
[Jul. & Aug., 1863]
[Aug. & Sep., 1863]
[Sep. & Oct., 1863]
[Nov. & Dec., 1863]
[Jan. & Feb., 1864]
[Mar. & Apr., 1864]
[May & Jun. 1864]
[Jul. & Aug., 1864]
Sept. & Oct., 1864, Stationed In the field
[Nov. & Dec., 1864]
[Jan. & Feb., 1864]
___to May 1, 1864, dated May 14, 1864, Stationed In the Field
[May & Jun., 1864]
[Jul. & Aug., 1864]
[Sep. & Oct., 1864]
[Nov. & Dec., 1864]
[Jan. & Feb., 1864]
No further rolls [Starts at Card #66]

M323: Compiled Service Records of Confederate Soldiers Who Served in Organizations from the State of Texas