I suspect it was Lt. Lockhart's section.

"Colonels Newton and Stirman and Lieutenant Lockhart are spoken of in high terms by Colonel Brooks in his report of their operations."

John O. Lockhard, age 41, born in Virginia, Sergeant, Capt. Westley Roberts' Company of Artillery, Missouri Volunteers,* enlisted September 7, 1862 at Camp McKissick by Capt. Roberts for 3 years or the war, promoted 1st Lieutenant April 6, 1863, granted sick leave November 27, 1863, severely wounded in arm April 30, 1864 at Jenkin's Ferry, Ark., paroled at Memphis, Tenn. June 5-10, 1865

* This company subsequently became Capt. Samuel T. Ruffner's Company, Missouri Artillery and subsequently designated the 1st Missouri Field Battery November 19, 1864

M322: Compiled Service Records of Confederate Soldiers Who Served in Organizations from the State of Missouri