by Van Powell
The Mystery of the 15 Sounds
_By Van Powell_
When Roger's uncle offered him an opportunity to help in his scientificlaboratory while the boy's parents were in Europe, Roger jumped at thechance. His uncle's laboratory--one of the most perfectly equipped--wasthe most fascinating place in the world.
Even the latest scientific devices, however, could not keep out the"Voice of Doom" which sounded hollowly through the laboratories in thedead of night, or prevent the ghostly antics of the phantom kangaroo andhis ape-like companion. These and many other occurrences make THEMYSTERY OF THE 15 SOUNDS one of the best boys' mystery stories of theyear.
_Books for Boys_
In selecting the books of this series we, as publishers, have tried topresent a varied assortment, which will stir the imaginations of allboys. At the same time we have kept these stories from beingnerve-wreckers.
Herman M. Appel Secret of the Flambeau, The.
William Dixon Bell Sacred Scimiter, The. Moon Colony, The. Secret of Tibet, The.
Walter Butts, Jr. Brothers of the Senecas.
Graham M. Dean Agent Nine and the Jewel Mystery. Agent Nine Solves His First Case. Circle 4 Patrol. Daring Wings. Herb Kent, West Point Cadet. Herb Kent, West Point Full Back. Slim Evans and His Horse "Lightning." Treasure Hunt of the S-18.
Edwin Green Air Monster. Secret Flight.
William Heyliger Big Leaguer. Detectives, Inc. Fighting Blood. Loser's End, The.
Norton H. Jonathan Dan Hyland, Police Reporter.
Gilbert A. Lathrop Whispering Rails. Mystery Rides the Rails.
George Morse Circus Dan. Extra. Vanishing Liner.
John A. Moroso Nobody's Buddy.
Ambrose Newcomb Eagles of the Sky. Flying the Coast Sky Ways. Sky Detectives. Trackers of the Fog Pack.
Van Powell Mystery of the 15 Sounds.
Warren F. Robinson "G" Man's Son, The. "G" Man's Son, at Porpoise Island. Phantom Whale, The.
Lieut. Noel Sainsbury Bill Bolton and the Flying Fish. Bill Bolton, Flying Midshipman. Bill Bolton and Hidden Danger. Bill Bolton and Winged Cartwheels.
Harold M. Sherman Captain of the Eleven. Down the Ice. Interference. In Wrong Right. It's A Pass. Over the Line. Strike Him Out. Tahara, Among African Tribes. Tahara, Boy King of the Desert. Tahara, Boy Mystic of India. Tahara, in the Land of Yucatan. Under the Basket.
Wayne Whipple Young Abraham Lincoln. Young Franklin Roosevelt.
THE GOLDSMITH PUBLISHING CO. CHICAGO, ILL.
Transcriber's Notes
--Copyright notice provided as in the original--this e-text is public domain in the country of publication.
--Silently corrected palpable typos; left non-standard spellings and dialect unchanged.
--In the text versions, delimited italics text in _underscores_ (the HTML version reproduces the font form of the printed book.)