In the 1880 Census from Obion Tennessee, household of S. J. Rogers their is listed a Thomas M Allcock,57(relation Uncle) and Annie,27 (cousin). I was wondering if this is your Thomas Allcock. And if he is an Uncle of Mary, making Mary an Allcock (possibly). How do you think this fits? Do you have any information on the Allcocks staying with the Rogers in 1880?