From my personal notes mostly from Alexander Papers]:

6/22 S O #12 Army of the South West
Capt W C Adams is authorized to raise one or more Co’s of mounted Infy in Lawrence & Randolph Co’s for C.S.A. & to immediately aback enemy without waiting on special orders

7/12 Smithville-Baber enlisted in & was elected Capt of Co D

7/19 Hindman to Capt C W Adams-directs that you report at once to Gen McBride, cdg N. W. Ark., at Batesville

7/23 Newton to Capt Adams-Gen Hindman directs that you assume command over the Co’s now raised & organized, & armed, in the counties of Greene, Randolph, Lawrence & Poinsett, & move them as rapidly as possible, to some suitable place of rendezvous at or near Jacksonport.
When they are assembled there you will effect a temporary organization of them into a Bn or Regt according to the number of Co’s, the number of them in each Co, who are armed & the kind of arms they have, as that ammunition may be furnished them.
The Bn or Regt thus formed is expected to be used against the enemy vigorously on Crowley’s Ridge as soon as it can be furnished with ammunition, & it is desired that you should rendezvous them & report as early as it possibly can be done. To furnish the ammunition it is necessary to know the number of eff men who are armed, the kind of arms & the number.

Co org dates range from 2/10 for 1 Co & 3 Co’s 2/15 & 1 Co 3/17
3 Co’s 6/13- 1 Co 6/28 [Camp Bragg] & 1 Co 7/6 [Camp Bragg]

7/25 Hindman to McBride cdg North Ark-dismount all your command except the extra Bn as suggested & send their horses home

8/2 Hindman to McBride-It was never intended that Col Adams command or any other Bn or Regt be “independent’. Your attn is called to the order of today dismounting it & ordering it to report to you

8/2 Spec Orders 43
II. Capt W. C. Adams is hereby appointed Lt Col, & Capt Milton D. Baker, Major of the Bn composed of the Co’s of
Capt Robt. R. Henry
Capt Joshua Warner
Capt Jos. C. Wyatt
Capt M. D. Baber
Capt M. Beshoar
Capt Alfred Gay
Capt John R. Wells
III. Lt Col Adams will at once assign to duty fit persons for AQM & ACS, with approval of Brig Gen McBride. Such persons appointed to immediately execute their bonds & send same to the proper Heads of Dept’s. Such appointments to be approved at these Hqs
IV. Lt Col Adams will immediately dismount his command & march to the encampment of Gen McBride at Batesville under whose orders he is placed. Col Adams command will be increased to a Regt as rapidly as possible.

Co dates:
6/7 Co G Organized at Powhatan
7/8 Co E This unit was organized in Pocahontas
7/9 Co A
7/12 Co D
7/19 Co B
7/19 Co C
July/Aug-Co H was formed in Randolph Co
8/4 Co …
8/6 Co I was formed at Sulphur Rock (Independence Co) All enlistments were at Sulphur Rock 8/6
8/7 Co K at Sulphur Rock
…. Co M was an Ark Co that was Co F 10 Mo

8/4 Randolph Co-Co I [Capt Bryan] org-merged w/Co H
8/6 Sulphur Rock-Co I [Capt Echols] org

8/7 Hindman to McBride-can you fill up your Bn to a 10 Co Regt & if so in what time? [Which Bn]
Has Col Adams Regt joined your camp if not when expected?

8/29 Certification of claim for Baber for one horse at $200-certified by W B Flippin QM for McBride Bgde CSA

9/8 Jacksonport-38th Ark organized [but see also 9/24]

9/13 Regt joins up w/27th Ark

9/21 Co’s org in July/Aug combined to organize as the 38th Ark Infy Regt

9/21 Shaver assigned to 38th Ark

When the Regt was finally assembled in Sept, 1862, it contained men from Yell, Izard, Lawrence, & Craighead counties. Its cdrs were Col Robert G. Shaver, Lt Col’s William C. Adams & Milton D. Baber, & Major R. R. Henry. The 38th was formally organized at Jacksonport, Ark on Sept 8, 1862. Shaver was unanimously elected Col
The unit was inducted into CS on Sept 21, 1862 at Jacksonport, Ark. The unit was composed of volunteer Co’s from the following counties:[6]
Co A, Capt James L. Sexton, organized at Lauratown, Ark on 17 June 1862.
Co B, Capt Joshua Wann, organized in Lawrence County, Ark on 19 Jul 1862.
Co C, Capt James J. Wyatt, organized at Camp Adams, Randolph County, Ark on 19 July 1862
Co D, Capt William J. Sanders, organized at Smithville, Ark on 19 July 1862
Co E, Capt M. Beshoar, organized in Pocahontas, Randolph County, Ark on 8 July 1862
Co F, Capt Alfred Gay organized in Evening Shade, Ark on 16 Jul 1862.
Co G, Capt John R. Wells, organized in Powhatan, Lawrence County, Ark on June 7, 1862.
Co H, Capt William A. Black, organized in Randolph County, Ark on July 15, 1862.[7]
Co I, Capt R. W. Echols, organized in Independence County, Ark on Aug 6, 1862.[8]
Co K, Capt Louis E. Knight, organized at Sulphur Rock, Ark on 7 Aug 1862.
Co L [?]
Co M, organized as Co F, 10th Missouri Infy Regt [9]

From SOR regarding 10th Missouri:

From SOR:
Coleman disbands/dismounts 9/9 [9/19?] to form Co’s of 10th Mo Infy
Most of Co’s C, D, F, G & I formed from Col Coleman’s Cav Regt.
Co’s C formed from elements of Col Coleman’s Cav Regt (disbanded Sep 62)
Boals Robert F. Mo 10th Infy Co C Capt Comm. 4/30/64
Co’s D formed from elements of Col Coleman’s Cav Regt (disbanded Sep 62)
(note for Co D says organized 19 Sep 62 from Co’s A, B & F/Coleman’s Regt, forming Co D/Pickett’s Bn),
D- org 9/19 by consol A-B-F of Coleman Regt [raised under Missouri Part Rgr act issued 7/17] Mo Cav forming Pickett Bn now Steen Regt

Lennox Jno W. Mo 10th Infy Co D Capt, Wright Elias D. Mo 10th Infy.-Co D Capt comm. 10/22/63

Co F Overton R.B. Mo 10th Infy Co F Capt, Wilson Isaac D. Mo 10th Infy. Co F Capt McKinney John C Mo 10th Infy
Co F Capt comm. 12/18/62