TO
MY FRIEND
MAJOR HUMPHRY MacCALLUM
WITHOUT WHOSE KIND AID THIS SERIES OF
WIRELESS ROMANCES WOULD NEVER
HAVE BEEN WRITTEN
Printed in Great Britain. Cinema and translation rights
reserved.

CONTENTS

CHAPTER PAGE
ITHE SECRET SIGNAL[ 11]
II THE VOICE FROM THE VOID[ 31]
III THE CALICO GLOVE[ 50]
IV THE DEVIL’S OVEN[ 68]
V THE MYSTERY WIDOW[ 89]
VI THE CLOVEN HOOF[ 109]
VII THE POISON FACTORY[ 128]
VIII THE GREAT INTRIGUE[ 146]
IX THE THREE BAD MEN[ 166]
X THE MYSTERY OF BERENICE[ 185]
XI THE MARKED MAN[ 204]
XII THE CROW’S CLIFF[ 223]

TRACKED BY WIRELESS.

CHAPTER I
THE SECRET SIGNAL

Geoffrey Falconer removed the wireless telephone receivers from his ears, and sat back in his wooden chair, staring straight before him, utterly puzzled.