My correspondent, who sent me all my information about the Craddock and Somerville lines. He has a copy of the Big Boileau Chart29, which I discovered in 2015. This means that multiple copies of BBC were made, which rather surprises me, given how large it is.

William served ten years in the Royal Navy including 18 months in H.M.Y. Britannia.  He now restores old and listed buildings in West Devon.  He and Anne have a daughter:
Philippa MAY SOMERVILLE born 1998.