Hello William
I have just returned from my short holiday in Wales.Whilst there I went to the Gwent record office and the Nelson Museum in Monmouth.
From the electoral rolls of Cwmcarvan Court 1912-19 I discovered who did indeed buy part of the property and also that William Parkyn JEFFCOCK didn't in fact move there till 1918.
I have passed the info on to Jack that a Henry Edward WALTERS RN was the buyer of the house and some of the surrounding lodges and cottages.
This of course links in nicely with Jack's grandfather being in the Royal Marines.
Hopefully we can move on now we have that query solved.

Regards,
Carol