Part I

THE COWLED MAN

I The Shadow of a Cowl
II The Pilbroch of the M'Gregors
III The Scorpion's Tail
IV Mademoiselle Dorian
V The Sealed Envelope
VI The Assistant Commissioner
VII Contents of the Sealed Envelope
VIII The Assistant Commissioner's Theory
IX The Chinese Coin
X "Close Your Shutters at Night"
XI The Blue Ray