I've enjoyed reading your posts about Adam's Regiment and the Battle of Prairie Grove and thought I would share some info that I have. My Great,great grandfather (James K. Polk Brittain) and at least on of his brothers (Thomas Abner Brittain) served in Adam's Regiment and I have copies of their muster cards and will list them for you. It may help shed some light on the formation and changes in their service. I'll start with Thomas Brittain's:

Thos. A, Britton: Corpl. Co. B Adams Regt: Appears on a register of payments on descriptive lists. Perior of service: From: June 20, 1862 to: Oct 31 1862 Paid: July 24 1862 By: W.E. Gibbs Amount: $74.92 Remarks: Clothing

Brittain, Thomas: Co. D; 27th Arkansas Infantry (Confederate) Private/Private Card Number: 44972732, 2884, 2951, 3005, and 214651; Adam's Regiment (Ark)

Thos Brittain; Pvt, Confederate B 27 Ark, Co D; Shaler's Regiment Arkansas Infantry*; Age 30 years; Company Muster Roll Feb 28, 1863; Joined: June 20, 1862, Where: Jef. T. Ship, Ark By: Capt. Owens Period: War; Remarks: Transferred from Adam's Regt Dec 7, 1862

Thos Brittain; Pvt, Confederate B 27 Ark, Co D; Shaler's Regiment Arkansas Infantry*; Company Muster Roll March & April, 1863; Enlisted: June 20, 1862, Where: Jeff. Township, By: Capt. Owens Period: War; Last Paid: Oct. 31, 1862, By: W.E. Gibbs; Remarks: Present

T.A. Britten, Pvt, Confederate B 27 Ark, Co D; Shaler's Regiment Arkansas Infantry*; Age ___ years; Company Muster Roll July & August, 1863; Joined: June 20, 1862, Where: Jasper, Ark, By: Capt. Bunch; Period: For the War; Remarks: _____

T.A. Brittain, Pvt, Confederate B 27 Ark, Co D; Gaither's Regiment Arkansas Infantry*; Company Muster Roll January & February, 1864; Joined: June 20, 1862, Where: Jasper, Ark, By: Capt. Owens; Period: War; Last Paid: August 31, 1863, By: Maj. Elisten; Remarks: Present

T.A. Brittain, Pvt, Confederate B 27 Ark, Co D; 27th Reg't Arkansas Infantry*; Redisdence: Carroll Co., Arks; Appears on a Roll of Prisoners of War of Co.D, 27 Regiment Arks. Infantry, Confederate States Army, commanded by Capt. M.V. Richardson, Surrendered at New Orleans, La., by Gen. E.K. Smith, C.S.A., to Maj.Gen. E.R.S. Canby, U.S.A. May 26, 1865, and paroled at Shreveport, La., June 8, 1865; Roll dated Shreveport, La., June 8, 1865

Britton, Thos. A.; Co. B. Adams Regt. Ark. Inf. (Confederate); Corp.

Here's James K. Brittain's:

Brittain, James K.P.; Co. D; Harrell's Battalion, Arkansas Cavalry (Confederate); Private/Private Card Number 44802639

Jas. K.P. Brittain; Pvt; Confederate B Harrell's Batt'n Cavalry, Ark;Co. D. Crawford's Battalion, Ark Cavalry*; Company Muster Roll for March 10 to June 30, 1863; Enlisted: March 10, 1863 Where:Belefonte, Ark; By Whom: Capt. Mitchell; Period: The War; Valuation in dollars of horse: 150 Horse Equipments: 25 Present or Absent: Present Remarks: Transferred from Adam's regiment (This last entry was crossed out) * This battalion subsequently became Harrell's Battalion, Arkansas Cavalry, which was also known as 17th Battalion Arkansas Cavalry

James K. polk Brittain latered applied for Confederate Pension and listed his dates of service "From 1862 to 1865" (April 1862 to June 25, 1865) Enrolled: Carroll Co. Honorably discharged or paroled on June 25, 1865 from the Army of the Confederate States, Hearlds Battalion, Arkansas

Physician Examination: in left hip caused by horse falling while in serviceof Herald's Battalion causing weakness in left side; not good and unable to do manual labor on account of age and injury.