II TWEEDLEDUM AND TWEEDLEDEE
III THURSDAY AT THREE
IV THE UNLIMITED SUPPLY
V THE ASTUTE MR. BIRNES
VI THE MYSTERIOUS WOMAN
VII A WINGED MESSENGER
VIII SOME CONJECTURES
IX AND MORE DIAMONDS!
X THE BIG GAME
XI THE SILENT BELL
XII THE THIRD DEGREE
XIII MR. CZENKI APPEARS
XIV CAUGHT IN THE NET
XV THE TRUTH IN PART
XVI MR. CZENKI EXPLAINS
XVII THE GREAT CUBE




CHAPTER I

THE FIRST DIAMOND

There were thirty or forty personally addressed letters, the daily
heritage of the head of a great business establishment; and a plain,
yellow-wrapped package about the size of a cigarette-box, some three
inches long, two inches wide and one inch deep. It was neatly tied
with thin scarlet twine, and innocent of markings except for the
superscription in a precise, copperplate hand, and the smudge of the