This will probably be of no use to you Alan, but may be of some interest.
My husband's Great-Aunt moved to Sennen in the late 60's/ early 70's and lived on Maria's Lane until the mid 90's. Her house remains in the family and we are privileged enough to spend most of our holidays there. On our last visit in July I was looking at one of the books in the house on the Sennen Lifeboat, which I think was printed in 1983 and which contained some interesting local maps. On one map including Maria's Lane a house is labelled "DGOH" standing for Dickie George's Old House, however Great-Aunt had crossed out DGOH and written in pencil "Maria's Cottage", which would suggest that she was aware of some link between Dickie George and Maria.
Couldn't work out where the cottage was supposed to be - any help on that one?