By Harper & Brothers

CONTENTS

I.[I Find Some New Relations]
II.[The Setting of the Stage]
III.[Hildebrand of the "Hundred"]
IV.[Some Hypothetical Questions]
V.[The Missing Link]
VI.["Madame Colette Marinette"]
VII.[The Whispering Gallery]
VIII.[Adventuring on "Sugar Loaf"]
IX.[1-4-2-4-8]
X.[I Receive an Ultimatum]
XI.[The Rider of the Black Horse]
XII.[Safe Find, Safe Bind]
XIII.[Le Chiffre Indéchiffrable]
XIV.[Another Break in the Circle]
XV.[One Corner of the Veil]
XVI.[Ad Interim]
XVII.[The Midsummer Night's Ball]
XVIII.[I Break a Promise]
XIX.[The Seat Perilous]
XX.[The Blind Terror]
XXI.[A Lost Clue]
XXII.[The Grapes of Wrath]
XXIII.[The End of the Coil]

Chapter I

I Find Some New Relations

The letter which lay before me had been written in old-fashioned longhand on the business stationery of the law firm of Eldon & Crawford, their given address being Calverton, Maryland. For the third time I read over the missive, although certainly it was short and to the point, its meaning unmistakable. But judge for yourself.

Calverton, Maryland,
June 22, 1919.