The PONY RIDER BOYS In The GRAND CANYON or The Mystery of Bright Angel Gulch. The Pony Rider Boys Series #7.
Philadelphia: Henry Altemus Co., (1912). 1st printing presumed, both series adverts list through this title. 212, [8 (adverts)] pp. Illustrated 12mo. Pale blue cloth with red & black stamping. Original publisher's printed buff paper dust wrapper. Uncommon in this first issue jacket. More