Even mermaids get cravings for ice cream on hot days according to this 1966 cover for Argosy magazine.
Ernest Hemingway was depicted as a mer-man in Punch magazine, 10th November, 1964.
Mermaids appear as sirens on Page 3 of 'Capsulysses', Punch magazine's 1955 greek myth spoof. See the full comic strip here.
Here's a secret for Searle fans: The Hotel de la Plage in Rayol Canadel on the French Riviera has a very special mural created by Searle for the owners in 1965. Here are Ronald and his wife Monica with the current owner in 2008.