the April 20, 1864, Organization of Confederate forces in Arkansas, lists McMurtrey's Battalion, under the Command of MAJ, E. L McMurtrey and Slemon's 2nd Arkansas Cavalry under the command of Captain O.B. Tibbs, which seems to indicated two separate organization in the Spring of 1864, during the Camden Expedition. Where is Slemon?

http://texashistory.unt.edu/ark:/67531/metapth146033/m1/813/?q=Camden