A wail, low but singularly penetrating, falling in minor cadences
to a new silence, came from somewhere close at hand.
"My God!" hissed Guthrie, "what was that?"
"The Call of Siva," whispered Smith.
"Don't stir, for your life!"
Guthrie was breathing hard.
I knew that we were three; that the hotel detective was within hail;
that there was a telephone in the room; that the traffic of
the Embankment moved almost beneath us; but I knew, and am not
ashamed to confess, that King Fear had icy fingers about my heart.
It was awful--that tense waiting--for--what?
Three taps sounded--very distinctly upon the window.
Graham Guthrie started so as to shake the bed.
"It's supernatural!" he muttered--all that was Celtic in his blood
recoiling from the omen. "Nothing human can reach that window!"
"S-sh!" from Smith. "Don't stir."
The tapping was repeated.
Smith softly crossed the room. My heart was beating painfully.
He threw open the window. Further inaction was impossible.
I joined him; and we looked out into the empty air.
"Don't come too near, Petrie!" he warned over his shoulder.
One on either side of the open window, we stood and looked down
at the moving Embankment lights, at the glitter of the Thames,
at the silhouetted buildings on the farther bank, with the Shot
Tower starting above them all.
Three taps sounded on the panes above us.
In all my dealings with Dr. Fu-Manchu I had had to face nothing so uncanny
as this. What Burmese ghoul had he loosed? Was it outside, in the air?
Was it actually in the room?
"Don't let me go, Petrie!" whispered Smith suddenly.
"Get a tight hold on me!"
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