Mike,
I have been studying the exchanged POWS from Ft Donelson, etc, including the 9th Tn cavalry battalion.
Have you uncovered any information that relates to their multiple consolidations with other regiments, and multiple brigade assignmens for the period of Sept-Dec., 1862?
This would be the period when they served as dismounted cavalry and underwent numerous consolidations with other understrength exchanged units.
Thanks for any help you may can offer.