CONTENTS CHAPTER CHAPTER I No Bigger than a Man's Hand II A Little Bit of String III The Registered Letter IV In the Wood V Under the Trees VI The Lamp is Lighted VII The Shadow on the Wall VIII The Blue Terror IX Behind Locked Doors X "Mr. Wil——" XI On the Way Home XII In the Ring XIII An Old Acquaintance XIV Russell Explains XV The Real Thing XVI The Yellow Hand XVII The Diamond Moth XVIII A Tangled Clue XIX Fencing XX The Waterfall XXI A Double Foe XXII From East to West XXIII An Expected Trouble XXIV The Long Dark Hour XXV The Diamond Moth Again XXVI Dr. Jansen XXVII No Foe of Hers XXVIII Beyond Surgery XXIX A Message XXX A Slight Misunderstanding XXXI A Question of Honour XXXII No Place Like Home XXXIII By Whose Hand? XXXIV A Human Derelict XXXV Jansen at Home XXXVI Leading the Way XXXVII A Respite XXXVIII A Sinking Ship XXXIX The Vaults Beneath XL Towards the Light XLI Vanished! XLII Treasure Trove XLIII In Hot Pursuit XLIV The Meaning of It XLV Aladdin's Cave XLVI Uzali's Way Out I II III IV V VI VII VIII IX X XI XII XIII