Roster of Confederate Soldiers, 1861-1865 shows:

Hisle, John KY 4th Cav. Co.E

There are only 4 HISLE's listed - the other three being from Virginia:

Hisle, C.C. VA 34th Mil. Co.C 2nd Lt.
Hisle, Daniel W. VA 6th Cav. Co.B
Hisle, Lloyd A. VA 6th Cav. Co.B

4th KY Cav Reg organized at Mosgrove, near Owenton, 9/10/1862 - surrendered at Mount Sterling 4/30/1865
FIRST COMMANDER: Henry R. Giltner, Col.
FIELD OFFICERS: Nathan Parker, Maj.
Moses T. Pryor, Lt.Col.
William R. Ray, Maj.
BATTLES:
Blue Springs - 10/10/1863
Rogersville - 11/6/1863
Laurel Gap - 10/1/1864
Saltville - 10/2/1864