I would agree, Alan, that Henderson's abbreviated style makes it virtually impossible to determine when a man was present, absent, or just what was his status. In fariness to Mrs. Henderson, however, it is a good starting place, and makes available abstracts of the Compiled Service Records which would in many cases be otherwise unavailable to the casual researcher. Most of the Georgia county libraries have a set of Henderson. But there are names missing, and it is unfortuante that her work stopped by the time she got to the infantry battalions. Nothing on Phillips' or Cobb's Legions, or the higher numbered battalions, some of them, like the 18th GA BN, very effective combat units. And obviously it leaves out both the artillery and caqvlary units, not to mention militia, reserves, etc., etc.
Several years ago -- probably ten, come to think of it -- I ran into a researcher at the Atlanta History Center who was working on Phillips Legion, and he indicated that there was a move afoot to continue Henderson. Did anything ever come of that?