Thank you to everyone for their input on the origins of Peter (Vincent) Cassanet. He was my 3x great grandfather through his daughter Emma and I had resigned myself to not knowing his French ancestry for sure. Having read the excellent biography of Dr Thomas Hodgkin, ‘Perfecting the World’, by Amalie and Edward Kass based on their research of the Hodgkin family papers, I was fairly confident that he was born in the Nantes area of Brittany and not from Nancy, Lorraine as stated on so many trees. I felt that if I could uncover the identity of F. Cassanet, a relative of Pierre Vincent, to whom Thomas Hodgkin was introduced during his medical studies in Paris, then perhaps I could trace my French ancestors. Having now started researching the children of Augustin Cassanet in Vannes, the youngest brother of Pierre is named Francois who I now know married and lived in Paris and was a professor of Latin ! Case proved I think ! Thank you again for the link to the baptism of Pierre Vincent in 1763. A wonderful find, especially as the entry doesn’t appear to be in any online indexes for the parish register.