Hi Peter,
Thanks for your wealth of information!
Is the will you refer to of a brother of Sarah Blacklock the will of Nelson Blacklock? I have noted this will is held at the National Archives and that Sarah is the administratrix but I am unable to obtain a copy (website will not let me progress to order page). I'm aware the NA restricted the times at which orders could be placed each day, but I managed to order the legal documents pertaining to the wrangle with Sarah's mother Mary, her brother Nelson and her uncle William straight after attempting to purchase Nelson's will, so I'm not sure why I couldn't progress the will order...
Anyway... I have seen the William Cornwell / Elizabeth Tyrrell marriage, seen the entries in the Baptist chapel book referring to the occupation of William, the upkeep of the doors etc and Elizabeth's excommunication (there's a woman who should never have been defending herself! Not that she seemed to care much about being kicked out!) The Tyrrells were also a well to do family (I seem to dimly recall they had a connection to Zouches as well, however I think it passed from the Tyrrells to the Daltons (who were connected to the Tyrrells) some time prior to Elizabeth Tyrrell's birth). However, the name of Holmes Cornwell would point towards William Cornwell and Elizabeth Holmes being his parents and I am satified this is as good evidence as we are ever likely to get.
Going back a generation then, there are just a number of things that don't sit quite right with me without further evidence. Although it is not a hard and fast rule, it is strange that none of the children of William and Elizabeth are called Sarah after his mother for one...
Do you have the legal documents relating to the court action William Cornwell and Sarah Blacklock took against her family? If not, the land and premises mentioned are Fulbourn Meadow, Sledds, Catch Hatch and Tibbys, all within Fulbourn. I've asked the Fulbourn Village History Society and Trinity Hall if they know the location of these places but the only one I can definitely pinpoint is Fulbourn Meadow. If I can tie the family together through the land, I'd be a little happier to conclude that William and Sarah are the correct parents! Have you followed up on any of the land that William Boulton owned? I feel that any land connection may be a way to further prove what I still feel is a theory in the absence of wills...
As for the William Cornwell / Ann Arber question, the most concerning aspect for me is that I haven't identified any DNA matches on the line. It is a long way back and so not impossible to have no matches, but I have proven other lines this far back so it's a definite possibility that there should be matches... For example I have DNA matches to descendants of Elizabeth Day's siblings, so I'm a little wary that I have none to the descendants of William Cornwell and Ann Arber if William is purportedly a sibling of Holmes. Hopefully someone will test and the match will prove for once and for all. Also, is William not a minor at the time of his marriage, but there is no mention of this in the record (altho admittedly Bottisham seems fairly lax on this compared to other parishes) And who is William Cornwell who married Jane Piper 1789, Bottisham? Why has he been discounted (I ask as I am sure other members have followed this up!)
I am also perplexed as to why the supposed burial of William Cornwell in 1795 describes him as a lab - in fact none of the burials that could be him in Fulbourn appear to be men of wealth, with some described as paupers. So are none of the burials recorded actually him and his burial is lost? Which leads us back to - is the baptism of William his supposed son and our definite ancestor also lost?
So many questions!
Karen