Ok I did a short search today. Robert F. Lumpkin (1805-1866) is not on wikitree as far as I could see. I could not find the land deed for the jail but it is probably there somewhere. However, I did find some census data for him in Richmond, Henrico Co, 1840-1860, and found online a couple of pages from his ledger that hold the names of the enslaved from 1849 and 1850. If you would like to tackle that project and create a profile for them, and a free space page for the persons in his ledger I can email you the notes I took and the sources.
Michelle Detwiler, Plantations Project