LOOKING FOR MORE INFORMATION!!! Since he did not join until September
of 1864, the question is, was he off somewhere else serving???
As posted by me: Thomas Bryant Dunn, b. 1837, from Olive Branch, MS-DeSoto
County, MS. He had married in DeSoto Co. MS in 1858. The Dunn family moved
to central Arkansas, Lonoke County, in the 1880's with his wife, a son, and seven
daughters- several of which were married already, came with him. He is buried at
Hamilton Cemetery, southeast of Carlisle.
The question is was T.B. Dunn a Civil War veteran? If so, with whom did he fight, etc?
One of his descendants has asked me to see if I could learn anything about that.
Any and all help would be greatly appreciated. Thanks!

George Martin gave this reply in the Mississippi site.
George who is Mr. Nice Guy and trying to help stated:
Here's a possibility, I could not locate an Arkansas pension.
T. B. Dunn, Private, Captain W. G. Grace’s Company, Mississippi State Troops,
enlisted September 15, 1864 at Jackson by Col. Patton for 6 months, recorded
present on the only company muster roll dated at Meridian, December 31, 1864,
no other records.
M269: Compiled Service Records of Confederate Soldiers Who Served in Organizations
from the State of Mississippi