Trevor, See this submitted tree at Rootsweb http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=DESC&db=cft2008&id=P-1132212160 The research seems to follow the line of Charles b1826 brother of your William Checketts. It all but confirms your assumptions, and gets back a bit earlier. The only differences I can see at a brief check are that Francis Checketts married Sarah Thornton (not Weston) and the husband of Mary Bushells was William John Checketts not John Checketts. Quite often we focus only on our own direct lines and forget that many other distant cousins are tracking back almost parallel to the same common ancestors. Peter