The book you are referring to is, "Confederate Veterans Interred in the Confederate Cemetery, Marietta, Georgia" by Larry O. Blair and Thomas E. Lyle, 1991, Byron's Graphics Arts, Maryville, TN. It is still available.

I have a copy and check, there is neither a F.M. Porter or a Driggers. However, there is one J.F. Porter, Co. G, 12th Georgia.

If you Google, "Byron's Graphic Arts" you will find it listed in Lousivlle, TN on Central Park Blvd. It is actually on Singleton Station Rd. I think the phone number is correct though (865-982-7261). It is a paper back book, 48 pages and is pretty inexpensive. I think under $15.

Martin