 Whetter gained a PhD from London University and was director of the Roseland Institute, a centre for Cornish Studies at Gorran Haven near St Austell.The institute contains a library of over 20,000 books in the process of being catalogued and put on-line and is the base for the publishing activities of Lyfrow Trelyspen and CNP Publications.The former produces works on Cornish history, essays and related subjects, and the latter, the quarterly Cornish magazine, "The Cornish Banner" ("An Baner Kernewek").