A few days ago I ran across pages from a Lanier family Bible, kindly posted to Ancestry by another user. I downloaded and transcribed the pages, and in the process found a list of “Age for Collored People.”
Based on other information in the Bible, I believe these people were enslaved in Davidson County, Tennessee, either by Susannah Lanier Parker, wife of William Parker, or her brother John Lanier and his wife Dicey Parker, my 4th great grandparents.

Age for Collored People
Alexander son of Isaac and Aggy born 30 May 1834
William son of same Borned 23 Aug 1835
Araminta Jane Daughter of same born 18 May 1837
Susan Emaline Daughter of same Born 13 Oct 1838
Unfortunately, I do not have any further information at this time. But I wanted to put this page online in case it is useful to anyone.