Abigail was much younger than Thomas, born about 1832.
1850 Census, Marshall County, Mississippi: Thomas Moody 35, Tennessee, Nancy Moody 30 Tennessee, Willis A Moody 12, Nat T Moody 9, Mary E Moody 7, Nancy E Moody 3, Louisianna Moody 3 mo (all children born Mississippi)
1860 Census, Marshall County, Mississippi: Thomas Moody 49, Tennessee; Abigal 28, Tennessee; Nathaniel 19; Mary E. 17; Jane E. 12; Louisiana 10; Iowa 8; Myron 2 (all children born Mississippi)
1880 Census, Scott County, Arkansas page 1, stamped 366 (no letter but must be A since page 2 was also 366): Thomas Moody 69, Tennessee, father born North Carolina, mother born North Carolina; Abigail 49, Alabama, no birth state given for her parents; Mechanic 18, Arkansas; Martha A. 16, Arkansas; Idonia 13, Arkansas; Thomas L. 11, Arkansas