ROGER DUVOISIN was born in Genva, Switzerland, in 1900, and came to the United States in 1925. He wrote and illustrated 40 books, including those about Petunia the silly goose and Veronica the hippopotamus, and illustrated over 100 more by other authors. He received the Caldecott Medal in 1947 for White Snow, Bright Snow and a Caldecott Honor in 1966 for Hide and Seek Fog, both written by Alvin Tresselt. Roger Duvoisin died in 1980. CLEMENT CLARKE MOORE (1779-1863) was a professor of literature and theology, and the author of the famous poem "A Visit From St. Nicholas", which later became known as the famous "Twas the Night Before Christmas." The poem was first published anonymously, but later was attributed to Moore. Moore's text greatly contributed to the modern-day Santa Claus story.