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Thanks, Thomas for your response and confusing date concerns. According to Elizabeth's tombstone (found at: http://www.rootsweb.ancestry.com/~tnsmith/cempics/mosscemmoss.htm) her birthdate was given as 1799 and death date of 1881. This grave is found in the Moss Cemetery in Moss Bend of Smith County, TN.
I found Thomas Moss in Smith County, TN per the 1840 Smith Co. TN census. Thomas and Susan purchase a tract of land in Smith County, TN with a slave woman and her child in 1848. Elizabeth and the children show up in the 1850 census living with Thomas, Susan and Jesse, though these three are mislabeled as "Maxsim" not "Moss". In 1860 Elizabeth and youngest son, Robert, shows up as Elizabeth Adcock and Robert Adcock as Elizabeth, apparently, remarried and living next door to Susan Moss (Thomas has died since last census). Jesse Thomas Scruggs has married and started a family and moved out. Daughter Mary S. Scruggs may have died as I have no later record of her. In the 1870 census Elizabeth has taken the Scruggs name back and is now living next door to her oldest son Jesse Thomas, who may have moved his family into Thomas and Susan's house as Susan is now deceased.
Elizabeth's age according to the census records is a mystery as in 1850 she is 40, in 1860 she is 45 and in 1870 she is 54. Given this recurring inaccuracy, I will give her tombstone the benefit of the doubt.