The assignment of Henry Hathcock as a son of Charles Hathcock Sr. is speculative and based only on circumstantial evidence:
1. Henry Hathcock lived in Lincoln Co TN when he married Martha Mitchell there in 1845.
2. The 1850 Lincoln Co census showed Charles Hathcock Sr. with a family that included four sons, but only one over 20 years of age; another was listed as 19 in the 1850 census. Another son, Charles Hathcock Jr., lived next door.
3. In the 1830 census (Tuscaloosa Co AL), Charles Hathcock was listed with 3 sons 0-5 and two sons 10-15. Therefore, there were several sons of Charles Hathcock Sr. not accounted for in his listing in the 1850 census and one of these could well have been the Henry Hathcock who married Martha Mitchell in Lincoln Co in 1845.
4. The Henry Hathcock who was listed in Hardin Co TN, with wife Martha and father-in-law Henry D. Mitchell must be the same one who married Martha Mitchell in Lincoln Co in 1845. This family moved back from Hardin Co TN to Lincoln Co TN and were listed there in 1880. Hardin and Lincoln Counties were close, both on the Southern border of Tennessee.

1850 Hardin Co TN
Name Age
Henry Heathcote 31 b TN
Martha E Heathcote 27 b GA
July A Heathcote 9 b TN
Wm L Heathcote 4 b MS
John F Heathcote 2 b TN
Francis Heathcote 0 b TN
Henry D Witchell 63 [Mitchell, father of Martha E. Mitchell]
Nancy Rowsey 37

Note that July A. Heathcote is 9 years old in this census, although Henry and Martha were married in 1845. Possibly she was not a daughter of Henry and Martha but instead Henry’s younger sister. Also note that July, John and Francis were born in TN but William was born in Mississippi.

1880 Lincoln Co TN
Name Age
Henry Hathcock 57 widower, b TN, f and m both b TN
W. J. Hathcock 32 son
Martha Hathcock 30 dau-in-law
James H. Hathcock 5 grandson
Martha M. Hathcock 4 granddau
Sarah L. Hathcock 1 granddau, b June 1879
Mary J. Hathcock 1 granddau, b June 1879
Charley Hathcock 20 son, attended school, works on farm
Mary Hathcock 40 sister

Note that William J. Hathcock and his wife Martha named their first daughter Martha, perhaps in honor of her mother and grandmother, William’s biological mother Martha Mitchell Hathcock. The second daughter was named Sarah, perhaps in honor of William’s step-mother Sarah Arnold Hathcock.

1850 Census of Lincoln Co TN

Name Age
Moses Arnold 50
Sarah Arnold 51
William S Arnold 22
Sarah Arnold 20
John C Arnold 15
David C Arnold 17
Thomas P Arnold 16
Charlotte Arnold 14
Martha Arnold 11
Malissa Tankerly 25
Amanda L Tankerly 6

1860 Census of Lincoln Co TN

Name Age
Moses Arnold 55
Sarah Arnold 55
Sarah Arnold 25

1870 Census of Lincoln Co TN

Name Age
Moses Arnold 70
Sallie Arnold 71
Sarah Arnold 40
Sarah Arnold 5
Martha White 31
S L White 12
Willis White 9
G W White 5
George Arnold 19

A Sarah Arnold married a W. B. Jennings in Lincoln Co TN on May 26, 1878 (Wilson Brown Jennings)

There is an Arnold Cemetery in Lincoln Co