the best advice i could give is to visit devon and and cornwall in your imagination first. read rebecca, jamaica inn and hidden cornwall by daphne du maurier, the devils foot in the sherlock holmes stories, watch the poldark tv series, peril at end house by agatha christie.

then you will see these places with heightened awareness.

thereis also a nice insight into the artists colony of st ives in the 1920's in christopher isherwood's lions and shadows.