Unexplored! Springfield, Massachusetts: Milton Bradley Company, 1922. 18.8 cm (octavo), pp. [1-8] 1-266 [267-268: blank], six inserted plates with illustrations by William Van Dresser, original pictorial gray cloth, front panel stamped in light blue and black, spine panel stamped in black. First edition. "This story deals with a department of the U.S. Government Service little known to the average reader -- the Forest Service of the West. The scene is laid in that wild region near Mt. Whitney marked 'Unexplored' on the Government Survey Maps. The hero, with the aid of a speedy biplane, performs gallant rescues in the path of a great forest fire, and plays a vital part in capturing the incendiaries. This is a swiftly moving story which will appeal to every red-blooded boy, also the reader will gather much geological information which is interwoven with the story." - publisher's advertising blurb. Includes a "Glossary" of geologic terms and "Key to Geologic Time," pp. 263-266. Endpapers tanned, a very good copy in good pictorial dust jacket with wear and closed tears at edges. (#158403).
No statement of printing.