Please help with unclear service record
A Confederate Service Record for BROOKING, Pvt, Co. K, 4th Alabama Infantry states:
Appears on a "Record" of the organization named above. From APril 27, 1861 to ___
Record Dated: McKenzie House near Richmond Virginia, Dec 31, 1864.
Period states For the War.
Died July 1864.
There is no "Starting date" so to speak. So when did he go into the service? I find only a couple of entries on muster rolls for him, listed as Asthols Brooking (It should be Ascerbus or something similar.) He got clothing in May of 1864. I find no entries for him being marked "present" I always thought he went in in 1861, but now I am wondering why there are not more entries for him. I was trying to determine what battles he might have participated in, but am now at a loss.
Any thoughts would be appreciated.