Im actually reasearching the same family. I actually have a lot of info on Harriet & Miles Whitehall. I believe Harriet's father's name was Sampson Bibbins who was sold in Currituck, NC(I need to check my files though).
Harriet's maiden name was Bibbins (my family I am researching). I am actually good friends with one of Harriet's gr gr etc grandaughters who is a Whitehall out of Omaha, NE. We grew up together (never knowing we were related:) Much of the information I have on the Whitehall's came from another of their descendants, Al Shelton. Al is a gr gr etc grandson of Harriet & Miles.
I have a family tree/file on the Whitehalls and am currently trying to figure out if Harriet was the sister to my gr4th grandmother Clara Bibbins. I may actually have the marriage date for Miles/Harriet.
I will email you directly with the info I have. Are you a Whitehall descendant?
Looking forward to working with you!