Contents

I.[The “Canary”]
II.[Footprints in the Snow]
III.[The Murder]
IV.[The Print of a Hand]
V.[The Bolted Door]
VI.[A Call for Help]
VII.[A Nameless Visitor]
VIII.[The Invisible Murderer]
IX.[The Pack in Full Cry]
X.[A Forced Interview]
XI.[Seeking Information]
XII.[Circumstantial Evidence]
XIII.[An Erstwhile Gallant]
XIV.[Vance Outlines a Theory]
XV.[Four Possibilities]
XVI.[Significant Disclosures]
XVII.[Checking an Alibi]
XVIII.[The Trap]
XIX.[The Doctor Explains]
XX.[A Midnight Witness]
XXI.[A Contradiction in Dates]
XXII.[A Telephone Call]
XXIII.[The Ten O’Clock Appointment]
XXIV.[An Arrest]
XXV.[Vance Demonstrates]
XXVI.[Reconstructing the Crime]
XXVII.[A Game of Poker]
XXVIII.[The Guilty Man]
XXIX.[Beethoven’s “Andante”]
XXX.[The End]

First appearances deceive many: the intelligence alone perceives what has been carefully hidden in the recesses of the mind. —Phædrus.