I'm not certain, but I think I may have found Hezekiah's grandfather. He may have been a slave that was a executed for trying/conspiring to revolt. I don't know for sure, but I am keeping my eyes on a Charles Billings from Soun a wife as of yet.
I found this list which mentions a Charles Billings that was hung for an attempted revolt: (http://users.bestweb.net/~rg/execution/C.htm) and then I later found thea href="http://www.ipoaa.com/denmark_vesey__and_his_co3.htm">http://www.ipoaa.com/denmark_vesey__and_his_co3.htm (Control F for charles Billings). Every single person listed with him were found to be executed on the previous link. On either on JUL 2nd 1822 or JUL 26 1822. So very sad. :(
I wish I could find some information on his wife and on his owners. The search continues.
I'll make copies of the information I have an archive it here.
The document that lists these executions wre pulled from The National Park Service Records:
Charles is also listed here: http://users.bestweb.net/~rg/execution/SO%20CAROLINA.htm