I suspect that other than the two companies that I mentioned from Pine Bluff and Helena that most of the other companies were from what was the 13th Arkansas Regiment of Arkansas Militia which included the "Capitol Guards" of Little Rock.
Below is part of a newspaper article from the Old Line Democrat Newspaper of Little Rock October 18, 1860, page 2, col. 2-3, about a review of the 13th regiment held on the grounds of St. John's College next to the Arsenal. many other noted persons were in attendence including the Colonel of the 24th Regiment, Doneldson McGregor, who entered the War as Captain of Company "D" of the (Fagan's) 1st Arkansas and was killed at Murfreesboror as Colonel of the 1st Arkansas.
"....while the reviewing officers took position on the former front, marched before them by companies,
in the following order: Pulaski Lancers, Lieut. Morrison, commanding cavalry, with lances, pennants and
handsome uniforms of blue and red, well drilled, and presenting a very gallant appearance; 1st comp. the
Capital Guards, Capt. Peay, drilled like veterans of the "Old Guard," and dressed in a uniform of blue
and gold, never yet surpassed in taste and neatness; 2d company, exceeding well drilled and fine
looking, Capt. Stillwell; 3d company, composed of gallant looking and intelligent men, Lieut. Griffith,
commanding; 4th company, the elite of the regiment, Sergeant Lee of the "Guards," commanding; 5th
company presenting a most soldierly appearance, Capt. Johnson; 6th company, with the step and front of
courage and intelligence, Capt. Bushnell; 7th company brave looking, erect and well-drilled, Capt.
Vance; 8th company looking as if they might have seen service, and would like to see it again, Capt.
Marshall; 9th company who we will venture to say, are all good riflemen, and familiar with the smell of
gun powder, Capt. Wellman.
When the parade was concluded, the regiment was formed by companies around [the] door of the
College, from which, by request of the Colonel, Gen. S. H. Hempstead addressed them in an eloquent and
soul stirring speech of about an hour."