I have some old data from the 80's on this family.I descend from Barnabus Michael Mallow brother to your Theodore Augusta Mallow. (My data shows Augusta and not Augustus)
Nancy (Anderson?) was married four times.I do not know the name of the first marriage...the page is smudged and it looks like McChildren?...not sure.Her second marriage was to a Whitehead with whom she had five children.Her third marriage was to Theodore Augusta Mallow. So the marriage certificate will show Nancy Whitehead. They had not been married very long when he died.She then married his brother, Henry Bear Mallow. (The Bear after Jacob's mother, Christina Bear Mallow, daughter of Jacob Bear and Anna Barbara Miller of Elkton, Rockingham County, VA.) The 1850 Census of New Madrid County, MO shows Jacob and Catherine living next door to their sons Henry Bear Mallow and Theodore Mallow.
Theodore Augusta Mallow born 16 November 1828.He died 7 February 1866 at age 39 years after an illness of typhoid pneumonia.He first married Elizabeth ? .His second marriage was 1864 to (Nancy)Mariah Stringer died August 8, 1941.
The info is very vague and I don't know if it really helps. This is old info.I think Laura is the daughter of Nancy Mariah Stringer.
Laura married 19 September 1880 to George Sellers born 1857 died 1928. George was the son of Minuard and Mary "Polly" H. Sellers.(Mary was a Turnbough.) To this union were born eleven children.
1. Matt Sellers married Lou Gregory 2. Frank Sellers married Erma Britton 3. Ernest Sellers married Ada Billingsley 4. Ira Sellers married Alpha Cottrell 5. Alonzo Sellers married (1)Nella Brown (2) Overa Brown Campbell. 6. Mamie Marie Sellers married Melvin Hogan 7. Anna Sellers married Ed Billingsley 8. Overa Sellers married Mide Setzer 9. Gerene Sellers married Roy Barr 10. Walt Sellers married Phobe Worley (It only lists 10)
This is all copied from the sheet that was mailed to me from family in MO. Hope it helps.