James L. Martin who served in the 26th Mississippi Regiment was in prison camp at Point Lookout MD when the war ended.
James S. Martin (also indexed as James L.) who served in the 11th Mississippi Regiment surrendered with Lee at Appomattox.
James L. Martin who served with the "Herndon Rangers", a twelve-month state company, enlisted on June 7, 1863, and deserted before his company's term ended on Oct. 27, 1863.

The parole paper in your hands should state the soldier's military command, if any. I can't guess what a Confederate soldier from Mississippi would have been doing in Arkansas at the war's end. Does the parole actually use the word "trooper" or "tropper"? Does the reference to Mississippi come from his residence stated on the parole?