SF Encyclopedia Picture Gallery
Edgar Earl Christopher. The Invisibles (Akron, Ohio: The Saalfield Publishing Company, 1903) [illus/Winfield S Luken: hb/]
Image courtesy of Clute Science Fiction Library at Telluride
Edgar Earl Christopher. The Invisibles (Akron, Ohio: The Saalfield Publishing Company, 1903) [illus/Winfield S Luken: hb/]
Image courtesy of Clute Science Fiction Library at Telluride