Hoyt,
It seems I was mistaken about the number oif entries in the book Immoral Captives by Joslyn for Mr. Fontaine. I guess my eyes are worse than I thought. Anyway the only info I can now find is this--
Fontaine, Lamar-- Maj. 4th Ala. Cav. Regt. (Roddy's)
Captured: Ringgold, Ga. 27 Nov. 63
What queues my interest is the escape by swimming story. Seems that is in the book, I am sure I read it, I will have to look that up and verify.
My apologies for the error in entries.