There's a discussion on this line at this URL that seems fruitful: http://genforum.genealogy.com/waddy/messages/329.html
Regardless, it seems relatively unlikely that Jane had 8 children by the age of 4 :)
Source for children other than Anthony and William please? I see Sarah at Wikitree but no others and still need sources for these three.
Any proof of a death date for Jane?
Thank you