CONTENTS
[CHAPTER I The Lone Man on the Island]
[CHAPTER II Missing: The Short and Long of It]
[CHAPTER III Tony Allegretto]
[CHAPTER IV A Solemn Moment]
[CHAPTER V Aunt Dora]
[CHAPTER VI Which Is Which?]
[CHAPTER VII How to Get a New Shell]
[CHAPTER VIII Hide and Seek]
[CHAPTER IX One Is a Heroine]
[CHAPTER X Baked in a Biscuit]
[CHAPTER XI The Boat Is Found]
[CHAPTER XII In the Cave]
[CHAPTER XIII The Strange Man Again]
[CHAPTER XIV The New Shell]
[CHAPTER XV Tommy Long Has a Bad Day]
[CHAPTER XVI The Canoe Race]
[CHAPTER XVII Miss Carrington in Judgment]
[CHAPTER XVIII Mother Wit's Discovery]
[CHAPTER XIX The Rescue]
[CHAPTER XX Billy's Story]
[CHAPTER XXI In Practice Again]
[CHAPTER XXII The Stolen Shell]
[CHAPTER XXIII Billy's Great Dive]
[CHAPTER XXIV The Big Day]
[CHAPTER XXV The Race Is Won]
[BY GERTRUDE W. MORRISON]
[By LAURA LEE HOPE]
[By GERTRUDE W. MORRISON]
[By VICTOR APPLETON]
[By CAPTAIN QUINCY ALLEN]
[By GRAHAM B. FORBES]
[By ARTHUR W. WINFIELD]
[By HOWARD R. GARIS]
[BY ALLEN CHAPMAN.]