I think we've corresponded before. (in fact i'm pretty sure we have)
Anyway, I can't find anything to verify the existence of Joseph Pearsall. The man you have as Richard's father. Where did you find that information? I've managed to find Samuel Pearsall, Thomas and the rest of the line but I can't seem to find a Joseph Pearsall with a son listed as Richard.... :(
Is there an internet source you used or did you find it in a book somewhere?