Looks like Col Griffith was not the only one trying to get companies from the recently disbanded Lay's regiment aka 20th Confederate.

From CSR's-Lay's regt
"Not recognized as legally organized and broken up about Dec 64, and the men afterwards assigned to other organizations, some of them having been previously turned over to the conscription bureau and some transferred to other organizations"

handwritten notes on some of the company records indicate Miss Co and Miss & La Co

From OR's, Vol 48 Union correspondence
HDQRS. MILITARY DIVISION OF WEST MISSISSIPPI, OFFICE OF THE CHIEF SIGNAL OFFICER,
New Orleans, La., February 23, 1865.
Lieutenant Colonel C. T. CHRISTENSEN,
Asst. Adjt. General, Military Division of West Mississippi:
COLONEL: I have the honor to submit to your consideration the following report of information received at this office this 23rd of February, 1865:
R. D. Fugler, a deserter from the Twentieth Confederate Cavalry, left the regiment in December, 1864; went to Brandon, Miss. ; left Brandon February 1 and arrived at Fort Adams on the 13th instant. States that the following troops are at Sharon:
Twentieth Confederate Cavalry, numbering, effective, 300;
Maybery's cavalry, unknown;
part of Dumonteil's cavalry, unknown;
Wood's brigade of cavalry, 1, 5000;
Colonel Griffith's command at Whitestown (Powers' regiment, numbering 450; Griffith's regiment, numbering 300);
Scott's command at Summit, under marching orders, only about 250. The men are very reluctant to go east or to join Forrest.
Wirt Adams with his command (number unknown) went north from Jackson in January.
Captain Jones' company of scouts, 100;
Captain Harvey's company of scouts, 80, are scouting along the Big Black; are armed with double-barreled shotguns, as more effective against the cavalry who may pursue their decoys into ambush.
Captain Owens' company of scouts and couriers, 100; headquarters Brandon, Moss.
Captain Harris' company of scouts (number unknown) is scouting in the rear of Natchez.
General Forrest had about 10,000 effective men of his own command and could muster from all quarters about as many more; headquarters at Brandon.
Is anticipating a raid from Natchez or Vicksburg, and is preparing to meet it. Captain McDonald, late of the Sixteenth Texas Infantry, gives information mainly confirmatory of previous reports and of value to this office.
I have the honor to be, very respectfully, your obedient servant,
S. M. EATON,
Captain and Chief Signal Officer, Mil. Div. of West Mississippi.

OR-Vol 49
JACKSON, MISS., February 25, 1865.
Captain W. A. GOODMAN,
Asst. Adjt. General, Chalmers' Div. of Cavalry, Columbus, Miss.:
CAPTAIN: I have the honor to acknowledge receipt of paragraphs XI and XV, Special Orders, Numbers 28, from district headquarters, assigning General Chalmers to the command of the Mississippi cavalry in the district, and providing for its organization into a division of three brigades, to be known as Chalmers' Division, and to be commanded by Brigadier General James R. Chalmers. I beg also to acknowledge receipt of General Orders, Nos. 1 and 2, from division headquarters, with paragraphs IV and V, Special Orders, Numbers 16, accompanying, and to say they shall be executed with as little delay as practicable. The disembarking of a considerable cavalry force at Vicksburg on the 19th instant, its advance in the direction of Big Black, and the daily expectation of an advance of this force against my lines, coupled with telegraphic order of Major-General Forrest to return till further orders all cavalry in this district,
have prevented my sending to their proper brigades to Fourth and Sixth Mississippi Regiments, which are assigned to Starke's brigade.
My whole force here at present consists of Mabry's former brigade,
a remnant of Ross brigade, and Wood's regiment, making altogether an effective total of 1,000 men.
McGuirk's regiment is now returning from North Mississippi, and upon its arrival I shall send either the Fourth or Sixth Mississippi at once to its proper command, and the remaining regiment at the earliest moment it can be spared.
I observe that Withers', Ashby's,and Butler's unattached companies are assigned to my brigade, but, as they belong to the Reserve Forces, I presume I will not be permitted to retain them.
In their stead I would respectfully suggest that the companies of Lay's regiment, of which I enclose a list herewith, may be assigned to me, in order that they may being corporate with some recognized battalion or regiment. The companies are mere skeletons, and when consolidated would probably make three or four companies of the legal complement. Lay's authority to raise a regiment having been revoked by the War Department these companies were ordered to report to me by Major-General Gardner, when in command of the district.
I am, captain, very respectfully, your obedient servant,
WIRT ADAMS,
Brigadier-General.
[Enclosure.]
List of companies of Lay's former regiment: A, Captain C. A. Hester; B, Captain Louis Winston; C, Captain W. D. Sneed; D, Captain J. t. Williams; E, Captain E. J. York; F, Captain P. J. Gibson; G, Captain J. D. Mitchell; H, Captain P. H. Wallace; I, Captain B. F. Kimbrough; K, Captain John Fletcher.