>>>>So, sorting out which "4th GA Cav" is involved presents some challenge. >>>>
I did a bit more digging and concur with what else you have stated about Clinch's regiment. Avery's did not get re-numbered until 1865. This does indeed rpesent a bit of a problem, but your post below may well have solved it too.
>>>>However, I would venture a calculated guess that Clinch's regiment had a flag (square ?) from the Dept of SC,GA, & FL, rather than an Army of TN flag (rectangular ?), since they served under the former from initial organization until the end of July 1864, then joined the latter in early Aug 1864.>>>>
That is my guess too - they had a square Charleston Depot battle flag when they came to Georgia. Other units of Johnston's/Hood's AOT did as well - particularly those units of Walker's Division that had served in the Charleston-Savannah area like Gist's and Mercer's Brigades.
If this theory holds up, then it would seem to me that teh flag in PA is from Avery's 4th GA, as they had been part of Wheeler's troops for some time and would be in the right place at the right time to get the flag issued to them.
>>>At any rate, can you put me in touch with the museum in PA that has the flag ? I'd REALLY like to talk to them !>>>>
Me too! That information I am not that privy to for some security reason - but I have sent an email to one who is and elt's see what we can do. More as I find out. Let's go private with the rest of this.