Produced by Stephen Hutcheson and the Online Distributed Proofreading Team at http://www.pgdp.net JET PLANE MYSTERY By ROY J. SNELL [Illustration: ] WILCOX & FOLLETT CO. CHICAGO 1946 COPYRIGHT, 1944, BY WILCOX & FOLLETT CO. ALL RIGHTS RESERVED PRINTED IN THE UNITED STATES OF AMERICA CONTENTS I Whistling Mystery 1 II Contact 10 III Friendly Enemies 20 IV A Glorious Fight 27 V A Good Show 34 VI Plane Wrecked 40 VII A Night’s Adventures 49 VIII A Look at a Mystery Plane 60 IX The Tagged Monkey 70 X “Hist There! You!” 78 XI Night Fighters 86 XII Up at Dawn 96 XIII The Jet Plane 105 XIV Ted’s Gony 115 XV The Secret Book 125 XVI Mostly Memories 134 XVII Voices in the Night 143 XVIII Luck, Pals and Providence 152 XIX Mysteries Deepen 158 XX A Ship from Some Other World 165 XXI Mary Brown from the U. S. A. 175 XXII Star of the Mist 183 XXIII Hot Cannibal Rivets 192 XXIV Twilight Battle 200 XXV Jack’s New Gunner 207 XXVI Jack’s Jet Plane Wins Its Way 217 XXVII Stratosphere Tactics 225 XXVIII The Jet Plane’s Last Battle 234 JET PLANE MYSTERY CHAPTER I WHISTLING MYSTERY