I just read your message again and I want to thank you for all the information on our mutual Carroll family. However, I don't descend from Luke's son Alfred.....I descend from Luke's daughter Eliza's son Alfred. Unless of course you weren't referring to me in your message. I assumed you were since I was the last to post on this thread prior to your posting. If I've misunderstood I apologize. It does get confusing when families reuse names like they do. I can fill you in on some of Eliza's family if you're at all interested.
I was doing a bit of research today and did find Luke and Elizabeth on the 1850 Census for Meigs County. So if he died in 1850 it was after the census was taken. I don't find them in 1860, so assume they died prior to that census. On the 1850 census their ages were given as Luke: 78, and Elizabeth: 72. Hope this helps a little.
Thanks again for all the information.