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
Mary J. Hathcock 1 granddau
Charley Hathcock 20 son
Mary Hathcock 40 sister

1900 Weakley Co TN
Name Age
William J Hathcock 53 head, fa b NC, m b NC
Marthay E Hathcock 50 wife, fa b TN, m b TN
Clarance Hathcock 7 orphan

1910 Union, Greene Co AR
Name Age
William J Hathcock 62 head, fa b TN, m b MS
Martha E Hathcock 57 wife, fa b SC, m b TN, mother of 5, 3 living
Clarence Hathcock 17 adopted son
Lillie Burroughs 12 ward

The 1850 census of Lincoln Co TN includes the following listing:

Family #1225
Name Age
Chas Heathcock 55
Frances Heathcock 45
Mahaley Heathcock 27
Polly Heathcock 25
William Heathcock 21
B Franklin Heathcock 13
Samuel Heathcock 17
Mathew Heathcock 15
Martha Arnold 3

Although at this time there is no definite proof, the fact that this child was living in a Heathcock family in Lincoln Co TN coupled with the fact that a Martha Arnold married W. J. Haithcock in Lincoln Co TN in 1872 is suggestive that the two Martha Arnolds are the same. However, there were two other Martha Arnold listings in the 1850 census of Lincoln Co TN:

Family #1173
Name Age
James Arnold 23
Mahaley Arnold 26
Martha Arnold 3
Charles Arnold 2

Family #713
Name Age
Agneller J Arnold 29
Elmira Arnold 28
Moses Arnold 7
Willis Arnold 4
Martha Arnold 3
Sarah E Arnold 1