I, too, am researching Nicholas Callister 1651. I can't find his parents but I have found Ellin Shimmin's father (John). I believe I am also from this line, Nicholas 1682, his son Thomas 1717 married to Jony Quayle 1726, then William 1743 married to Margaret Cooper 1745. If you need any further help with this line please let me know and I may be able to assist. I have lots of information including Wills and IGI information.
Isabel