For starters on POMPEY you might try this site and scroll down to Pompey.

http://www.freeafricanamericans.com/Pettiford_Ridley.htm

This site also has some photos of Pompey descendants who migrated from the Brunswick, VA area to the locations you mention of Ohio, Indiana & Michigan.

http://www.freeafricanamericans.com/19th_2.htm

Have you seen these before?