Sometime when I can work out how to do it there might even be a family tree of some sort.
There is in Mary's possession a Bible, which records many entries of various births deaths and marriages. This in itself makes fascinating reading. Over many generations people have painstakingly added to it recording mostly the Denison family and the Jones family into which Madeleine's father John married. The earliest date there is 1775 when Hugh Jones married Mary Leng. This page has those dates.