He was appointed LT COL on May 18 1862 during that reorg at Corinth. I believe he led the regiment in its part at Farmington so may have been acting as such earlier. He then resigned on July 21, 1862 and returned to Arkansas. THis is on his CSR's It also has his order directing him to "report without delay" to Maj Gen Hindman on Jan 22, 1863. Figured I would go ahead and get it for you...not like I am going anywhere with 8 inches of snow and temps around 15 degrees!