CONTENTS

I.[A Mysterious Affair]
II.[How the Chase Ended]
III.[The Shadow That Lay Behind]
IV.[Clews and Suspicions]
V.[The Riddle of the Night]
VI.[A Little Discrepancy]
VII.["Coming Events Cast Their Shadows Before"]
VIII.[Ailsa Lorne]
IX.[Blind Groping]
X.[Another Strand in the Web]
XI.[The Cloudburst]
XII.[The Thunderbolt]
XIII.[A Question of Veracity]
XIV.[A Change in the Program]
XV.[A Clew from the Air]
XVI.[A Bold Stroke]
XVII.[A Blunder and a Discovery]
XVIII.[Springing a Surprise]
XIX.[Picking up Threads]
XX.["How Sharper Than a Serpent's Tooth"]
XXI.[When Two and Two Make Four]
XXII.[When Four and Four Make Eight]
XXIII.[The Lady at the Gate]
XXIV.[The Mousetrap]
XXV.[The Fly in the Ointment]
XXVI.[The Open Window]
XXVII.[The View Halloo]
XXVIII.[Loisette is Vindicated]
XXIX.["Quick! Fire!"]
XXX.[Nearing the Truth!]
XXXI.[How the Truth Was Told]