Both Thomas and Margaret are on the 1900 Dunklin Co, MO census.I guess you meant Margaret had died before the 1910 census, as Thomas is widowed by then.
You should post a query on the Dunklin Co, MO GenWeb site, I don't see you listed on there in their queries.Someone has made a surname index of the Hornersville Cemetery and the name of Maybry is listed.Have you checked to see if Margaret is buried there?
Using the 1880 census search on http://www.FamilySearch.orghttp://www.FamilySearch.org looking for Mabrys born in TX, this H.T. is a close match in age.And, it wouldn't be the first time I've seen names swapped around.He's Henry in 1860, but by the time he's out on his own he may be going by Thomas, who knows.My gr gr grfth, James Rice, had a brother the family called Miller Rice.It took me a bit to find him on his own, as it turns outhis name was actually Adam Miller Rice.First census he's Adam M. Rice, next one he is A. Miller Rice and last one he's just plain old Miller Rice.James had a son everyone called Pierce Rice.I thought his name was Pierce Oliver Rice until I found him as a ranch hand in TX as "Ollie."His descendant has since got me straight, his name is Oliver Pierce Rice.They sure don't make it easy for us, right?
1880 census Hopkins Co, TX:
NameRelation Marital Status Gender Race Age Birthplace Occupation Father's Birthplace Mother's Birthplace J. W. BURNSSelfMMaleW39GAFarmingSCGA S. A. BURNSWifeMFemaleW37ALHousekeepingNCGA J. M. BURNSSonSMaleW14TXWorking On FarmGAAL J. F. BURNSSonSMaleW11TXWorking On FarmGAAL A. L. BURNSSonSMaleW8TXAt HomeGAAL J. E. BURNSSonSMaleW7TXAt HomeGAAL G. T. BURNSSonSMaleW3TXAt HomeGAAL Buster BURNSSonSMaleW1MTXAt HomeGAAL W. M. MABRYSSonSMaleW19MSWorking On FarmSCAL H. T. MABRYSSonSMaleW17TXWorking On FarmSCAL E. BAKERFatherLMMaleW62NCFarmingUNKNOWNUNKNOWN
1870 census Hopkins Co, TX - children all dittoed in with stepfather's surname, it isn't the first time I've found this happening:
Burns, John, 39, b GA - no land value/personal $414 " Sarah, 27, b AL " William, 9, b MS " Henry, 7, b TX " James, 3, b TX " John, 1, b TX
I'm guessing Sarah and her Mabry husband were in MS in 1860.Maybe not even married, yet.There is a William P. Mabry in Attala Co, MS, 19, born SC, laboring on farm.Sarah's first Mabry son is named William, maybe a match?????His age and birth location fit info from 1880 census for H.T., but still a long shot there.
I would look for a Mabry from TX fighting and dying in the Civil War.Lots of clues here, and I would work on proving or disproving this, if it were my family.
Sure would be nice if the above Sarah is the mother of your Thomas Henry, as her father is living in the household in 1880, gives you a head start onher family.