His employers valued his work highly enough to send Richardson back to Paris to cover the Exposition Universelle Internationale, the world's fair of 1900.
[4] He illustrated Frank R. Stockton's The Queen's Museum (1906), Edith Ogden Harrison's The Enchanted House (1913), and Frances Jenkins Olcott's The Red Indian Fairy Book (1917), among other works.
According to youngest son, Allan, Richardson provided a variety of illustrations to the Works Progress Administration during the Great Depression.
[5] For John Heming Fry's "diatribe against modernism," The Revolt Against Beauty (1934), Richardson supplied pictures that parodied the work of Paul Gauguin and Vincent van Gogh and characters from newspaper comic strips.
[6] After his death in 1937, Richardson was memorialized with a posthumous volume that matched traditional tales, like "Three Billy Goats Gruff" and "The Bremen Town Musicians", with brightly colored illustrations by the artist.