Thanks Allen, re J. W. Mills. He is mentioned in William W. Bennett, A Narrative of the Great Revival which Prevailed in the Southern Armies ..., p. 204, in which he is quoted as having written to "Bishop Pierce, of Georgia," and I assumed he was with a Georgia regiment.
Only the Catholics, Methodists and Episcopalians had bishops at that time, but I believe that Florida was in the Georgia Methodist Conference, so a Methodist chaplain of a Florida regiment writing back to his bishop would have written to the bishop of the Georgia Conference.
Henry Persons, Jr., a student of Tige Anderson's brigade, has advised me that W. A. Simmons was the chaplain of the 11 GA. The same source (Great Revival) reports Simmons's work with a Georgia brigade during the Suffolk Campaign.
The work of the chaplains in both the Northern and Southern armies is largely overlooked, but they played a vital role in ministering to both the spiritual and worldly needs of the men. I remember reading somewhere that one chaplain offered classes in learning to read for his regiment.