OK, here is what we have on C. L. Oliver of the 24th Miss. Cavalry Battalion from Fold 3

His file is indexed under the name of Cyrus L. Oliver Co. B - E, 24 Battalion, Mississippi Cavalry
Private Private
It includes only two cards.

Card #1 Moorman’s Batt’n, Cavalry. Miss.

Company Muster Roll for Nov. 24 to Aug. 31,1864 Present

Ayrus [x] L. Oliver, Private, Capt. B. Hudnall’s Unattached Co.
of Cavalry, Mississippi Volunteers,*

Enlisted Aug. 30, 1864 at Brook Haven by Maj. Richardson for the war

[x] Name appears in column of names Present: as, Cyrus L. Oliver

* This company subsequently became (2d) Company B, Moorman’s Battalion Mississippi Cavalry

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Card #2 24 Battalion Cavalry

Roll of Prisoners of War of Co. E, 24 Miss. Cav. Batt., _______ commanded by A. J. Lewis, Sr.,, Capt., surrendered at Citronelle, Ala., ________ May Fourth, 1865, and paroled at Gainesville, Ala., May 12, 1865

C. L. Oliver, Pvt., Co. E. 24 Battalion Mississippi Cavalry, ,resident of Lawrence County, Miss.

Compiled Service Records of Confederate Soldiers Who Served in Organizations from the State of Mississippi

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Note, if it is known by the family that Cyrus did not survive the war, then Card # 2 must refer to Cornelius, I would believe that Card # 1 is indeed that for Cyrus?