I can't add anything useful to what has been said, but I've been struck by how many places are familiar to me from my own family -- Cawsand, where my great-great-great grandfather lived (and whose antecedents were mysterious until a few months ago), Diptford, South Brent, Dittisham, even Singapore, where I lived 70 years ago.
For anyone interested in Cawsand it's worth noting that Cawsand and Kingsand are effectively one village, and I think they have been for a long time. However, until the county boundaries were redrawn in the 19th century, the boundary between Devon and Cornwall ran between the two, with Kingsand in Devon (like most of the Mount Edgecombe peninsula). All of it is now in Cornwall.
