State Library of NSW
Sir Hudson Fysh - postcard: Capt. H. Butler by monoplane over St Vincent Gulf, thence by Commonwealth Mail, 19191919
Returning from World War I, Capt. Harry Butler flew airmail from Adelaide to Minlaton in a Bristol M. 1C, Red Devil.
Souvenir postcards bore the inscription "The plane was great in War but it will be greater in Peace. This little souvenir from the Clouds is the beginning of a new era in mail and passenger transport. So keep your eye on the Aeroplane."