Thanks for replying.
I have been doing a bit of digging for Alan Banks Chester, Peter's step brother. He never really knew his Dad as he died when he was very young, and his Mum hasn't told him much either. I have been in touch with Ruth and Peter Kerr, who are in touch with Bronte, and she identified some family photos including Abraham. I printed off some information for Alan but I haven't heard from him since. Perhaps the vision of a family going back hundreds of years was too much! I will wait for him to get back in touch with me, so I can tell him all the other things I know, and then I will get back in touch with you. Thanks for writing - very kind of you
Adela