This is a very old post but will try my reply anyway.
I have been researching the Thomas H, and Elizabeth (BRADEN) Clarke family for several years now.
With the help of several researchers online, have pieced more of the family puzzle together with my strongest work on the James and Sarah (Burchfield)Clarke family, James being the son of Thomas H Clarke.
Anxious to exchange info with others working on or related to this Clarke line. If no replies to this after such a long time, in a day or so I will try to start a new thread on the CLARK and CLARKE message boards.