Your Francis Marion Carroll who was born in 1849 could not be my Frances/Francis Carroll. My Frances/Francis was named in Thomas Carrolls will written in 1840 Fayette Co, Ga. I have no proof, as yet, if my Frances was a son or daughter.
I have major internet/email problems at the moment due to our old browser which can't be upgraded until we can upgrade our computer. To use genforum, without getting locked up, I have to come over here to the library.
I have found my Thomas Carroll's 2nd wife was Nelly Vickery. They married in Coweta Co, Ga on 21 Nov 1836.
I also think I have found the marriages of two more of Thomas' children.
I hope to have more answers before too much longer. If you wish to contact me please email me: firstname.lastname@example.org