 Fairies became a popular theme in art and literature in the early 20th century following the releases of The Coming of the Fairies by Sir Arthur Conan Doyle , Peter Pan by <unk> <unk> , and the fairy @-@ themed work of Australian Ida <unk> <unk> . Queen Mary made such themes even more popular by sending <unk> postcards to friends during the 1920s . In 1918 , Barker produced a <unk> series depicting elves and fairies . 
