Hi Lindsay, so sorry to have been the bearer of ill tidings
I have been working out another bit of evidence which I think ties in. There is a will on the Oxfordshire FHS board here
http://wills.oxfordshirefhs.org.uk/az/wtext/basson_001.htmlFor a Sarah Basson, but I am fairly sure it should be Baston, I have found her in the 1841 & 51 census's in Aston as born 1778 in Aston, she mentions some Cripps relations which I think are your family (though it would have helped if she had given George his full name of George Jones Cripps). The will says she is a widow but makes it fairly plain she had no children of her own, she refers to John, James, Edmund and George Cripps as her first cousins children of her aunt & uncle John & Mary Cripps (though in fact John was the child of Johns first marriage to Elizabeth). I have been working through the rellationships to see how it fits.
John Cripps (b1716) & Sarah (nee Allen) of Buckland had among their children a Betty Cripps born 1746, there is a marriage in Bampton in 1771 of a Betty Cripps to Joseph Rickets. They had 2 daughters Maria in 1772 and Sara in 1778. Betty Rickets of Aston is buried in 1826 aged 79 which gives the correct approx date of birth of 1746. Then there is a marriage in Shifford in 1799 of John Baston to a Sarah Rickets and the Sarah Baston in the 1851 census is the correct age to be the daughter of Joseph & Betty Rickets.
So I think this is a further bit of evidence for the theory I put forward above.
I hope you don't mind too much going back through your papers
DebbieG