Blue cloth hard cover with silver stamping, textured cream end papers. Laid in facsimile of a "Gummed sticker advertising the Silver Hat, the first illusion to incorporate Walter Jeans' revolutionary 'mirror tunnel' principle." Portrait frontispiece. Copy number 504 of a limited edition of 500, numbered 501 to 1,000. Illustrated, 161 pages. A few scuffs to cover, else in very good condition.