Thanks, Emma. I understand that part of the principle, but there's a new wrinkle. Mary Henderson was actually Mary Virginia (Hook) Henderson. Her husband died the year before the deed, and she died the year after. I'm guessing that your suggestion is correct in this case, since at the time of ownership of the slaves, her surname, and her husband's previous to that, was Henderson. But her birth name is Hook. Is Henderson still correct?
[LATER] Mary was Harriet's mother, BTW.