"But if Marden's account is true--"
"West, as he lost consciousness, saw Marden go in exactly the same
way."
"Marden was seated by the open window, but I cannot conjecture how
any one can have got at West, who sat by the table!"
"The case of Marden is little less than remarkable; he was some
distance from the window. No one could possibly have reached him
from outside."
"And the constable?"
"The constable can give us no clue. He was suddenly struck down,
as the others were. I examined the safe, of course, but didn't
touch it, according to instructions. Someone had been at work on
the lock, but it had defied their efforts. I'm fully expecting
though that they'll be back to-night, with different tools!"
"The place is watched during the day, of course?"
"Of course. But it's unlikely that anything will be attempted in
daylight. Tonight I am going down myself."
"Could you arrange that I join you?"
"I could, but you can see the danger for yourself?"
"It is extraordinarily mysterious."
"Mr. Cavanagh, it's uncanny!" said Bristol. "I can understand that
one of these Hashishin could easily have got up behind the man on
duty out in the open. I know, and so do you, that they're past
masters of that kind of thing; but unless they possess the power to
render themselves invisible, it's not evident how they can have got
behind West whilst he sat at the table, with Marden actually
watching him!"
"We must lay a trap for them to-night."
"Rely upon me to do so. My only fear is that they may anticipate it
and change their tactics. Hassan of Aleppo apparently knows as much
of our plans as we do ourselves."
Inspector Bristol, though a man of considerable culture, clearly was
infected with a species of supernatural dread.
CHAPTER VIII
THE VIOLET EYES AGAIN
At four o'clock in the afternoon I had heard nothing further from
Bristol, but I did not doubt that he would advise me of his
arrangements in good time. I sought by hard work to forget for a
time the extraordinary business of the stolen slipper; but it
persistently intruded upon my mind. Particularly, my thoughts
turned to the night of Professor Deeping's murder, and to the
bewitchingly pretty woman who had warned me of the impending tragedy.
She had bound me to secrecy--a secrecy which had proved irksome,
for it had since appeared to me that she must have been an
accomplice of Hassan of Aleppo. At the time I had been at a lo
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