Dates of birth and death are from their gravestone, a modern polished granite double stone that looks to have been erected after 1970. The dates may have been copied from the older stones that it replaced.

1850 census of Breathitt Co., Ky, district 1, enumerated 21 Aug, lists on p. 30 as family #225:
Alfred Back, 43, blacksmith, b. Va; Isabel, 41, b. Ky; Mary, 21; Elizabeth, 18; Henry, 17; John B., 15; Joseph B., 13; Alfred, 11; Benjn, 7. All children born in Kentucky.

1860 census of Morgan Co., Ky, West Liberty precinct, enumerated 28 July, lists on p. 107 as family #667:
Alfred Back, 53, b. Va, farmer; Isabel, 50, b. Ky; Mary, 30, b. Ky; Joseph, 22, b. Ky; Alfred, 19, b. Ky; Benjamin, 17, b. Ky.

1870 census of Menifee Co., Ky, Dry Ridge precinct, enumerated 29 June, lists on p. 4 as family #21:
Back, Alfred sen., 63, b. Va, blacksmith; Isabell, 60, b. Va; Mary, 42, b. Va, weaver; Surrilda, 7, b. Ky; David, 6, b. Ky.

Surrilda and David are children of Mary.

The preceding household is headed by Alfred Back Jr, age 29, with wife Martha age 32.

1880 census of Menifee Co., Ky, Ridge precinct, enumerated 15 June, lists on p. 42 as family #352/371:
Back, Alfred sr, 73, farmer, b. Va Va Va; Isabel, 70, wife, b. Ky NC NC; Marry, 51, dau, single, b. Ky Va Ky, David J., 17, grandson, b. Ky Ky Ky.

The following household is headed by Alfred Back Jr, age 39, with wife Martha age 42.