I am researcing Margaret's sister, Sarah--my husband is descended from her.She married Josiah Roberts. I have always wondered if all the 20 children were from one wife or if Wm had more than one wife. You can find my info at:http://www.gencircles.com/users/jjohns/1http://www.gencircles.com/users/jjohns/1
There is also alot of Garren info on the gencircle site that I am sure you will find helpful.
Looking forward to hearing from you, Judy Johns Tamaqua, PA