FOREWORD

Contents

Chapter 1 "THEM MOUSES IS EXTRAVERTED!"

Chapter 2 A CREEPING THING!

Chapter 3 A "SOUND" CLUE

Chapter 4 AN ELECTRICAL TRAP

Chapter 5 WHAT ELECTRICITY COULD NOT CATCH

Chapter 6 A WEIRD STORY

Chapter 7 SCIENCE TO THE RESCUE

Chapter 8 BASKETBALL AND BRAINS

Chapter 9 THE VOICE IN THE SILENCE

Chapter 10 A DEFEAT FOR SCIENCE!

Chapter 11 A PUZZLING THUMP

Chapter 12 DETECTIVE ROGER

Chapter 13 SCIENTIST ROGER

Chapter 14 CAPTIVE ROGER

Chapter 15 IN THE LAMASERY

Chapter 16 THE IMAGE SPEAKS

Chapter 17 BLACK SILENCE

Chapter 18 A LETTER ROGER HAD NOT SENT

Chapter 19 DISQUIETING DEDUCTIONS

Chapter 20 GHOST VOICES

Chapter 21 TRAGEDY!

Chapter 22 WHAT HAPPENED TO THE EYE OF OM

Chapter 23 THE ACID TEST

Chapter 24 AN IMPOSSIBLE CAMERA "SHOT"

Chapter 25 SCORE ONE FOR THE MYSTERY WIZARD

Chapter 26 ROGER LISTS HIS CLUES

Chapter 27 A "THERMAL" TRICK

Chapter 28 THE FUSE

Chapter 29 A SURPRISING CAPTURE

Chapter 30 THE VOICELESS WARNING

Chapter 31 THE HIDDEN MENACE

Chapter 32 SCIENCE FIGHTS CRAFT

Chapter 33 A NEW SUSPICION

Chapter 34 TRAGEDY STRIKES AGAIN

Chapter 35 THE STALKING TERROR

Chapter 36 A LAW OF NATURE

Chapter 37 REVELATION!

Chapter 38 THE VIGIL

Chapter 39 THE APE AND THE KANGAROO

Chapter 40 THE MYSTERY WIZARD'S SOLUTION

Chapter 41 MAN AND BEAST

Chapter 42 CLOSING TIME

Transcriber's Notes

By Van Powell

The Goldsmith Publishing Company
CHICAGO

Copyright 1937 by
The Goldsmith Publishing Company
MANUFACTURED IN THE UNITED STATES OF AMERICA