tim, I know of 2 martha fullers that I have in my tree, but don't have much info about them.
You may be referring to my g'g'grandfather's sister, Martha Hovater, b 1840 (likely in Franklin Co, Alabama). Her husband was John V. Fuller, b 09 Nov 1845, d 17 Oct 1922.
I have no info about their children, but have traced one line of Martha's ancestors back to the 1690's.
Her brother, my g'g'grandfather, Charles Obediah Hovater, married a woman who I believe her real name was Mary Hart Fuller. She also went by Martha and I am uncertain whether there was an error in some documents, or one may have been a nickname. I think I have all the names of her children except one, b 1864 in Alabama. It is possible that this child died shortly after birth and simply was not named, or perhaps it is just a missing record. The others are: Sidney b 1868, Artie b 1872, Dolly b 1874, Anna b 1876 (my g'grandmther), and Julie b 1878.
Please contact me if you think one of thes might be yours!