Professor Donald Cornwallis Treadway Trefusis ( 1921 - 2008 ) is an eccentric fictional character created by Stephen Fry , initially as an occasional contributor to Ned Sherrin 's BBC Radio 4 programme '' Loose Ends '' .
Professor Donald Cornwallis Treadway Trefusis ( 1921 - 2008 ) is an eccentric fictional character created by Stephen Fry . 
 He initially appeared as an occasional contributor to Ned Sherrin 's BBC Radio 4 programme '' Loose Ends '' .