Edward Wightman was a successful merchant and left behind a family when he was burned at the stake in 1612. In fact, I went to college with one of his descendants, Bobby Wightman. The Bobby Wightman of our day is a historian, by hobby if not by trade. As a descendent, he was allowed to dress up in something resembling surgical scrub and go into a room at SMU containing an original copy of the book about the burning of…..