The apparition of the phantom scimitar was due to the presence of someone who, by means of the moonlight, or of artificial light, cast a reflection of such a weapon as that found in the oblong chest upon the wall of a darkened apartment—as, Deeping’s stateroom on the Mandalay, his study, etc.
A group of highly efficient assassins, evidently Moslem fanatics, who might or might not be of the ancient order of the Hashishin, had pursued the stolen slipper to England. They had severed any hand, other than that of a Believer, which had touched the case containing it. (The Coptic porter was a Christian.)
Uncertain, possibly, of Deeping’s faith, or fearful of endangering the success of their efforts by an outrage upon him en route, they had refrained from this until his arrival at his house. He had been warned of his impending end by Ahmad Ahmadeen.
Who was Ahmadeen? And who was his beautiful associate? I found myself unable, at present, to answer either of those questions. In order to gain access to Professor Deeping, who so carefully secluded himself, a box had been sent to him by ordinary carrier. (As I sat at my table, Scotland Yard was busy endeavouring to trace the sender.) Respecting this box we had made an extraordinary discovery.
It was of the kind used by Eastern conjurors for what is generally known as “the Box Trick.” That is to say, it could only be opened (short of smashing it) from the inside! You will remember what we found within it? Consider this with the new fact, above, and to what conclusion do you come?
Something (it is not possible to speak of someone in connection with so small a box) had been concealed inside, and had killed Professor Deeping whilst he was actually engaged in endeavouring to force it open. This inconceivable creature had then searched the study for the slipper—or for the key of the safe. Interrupted and trapped by the arrival of the police, the creature had returned to the box, re-closed it, and had actually been there when the study was searched!
For a creature so small as the murderous thing in the box to slip out during the confusion, and at some time prior to Bristol’s arrival, was no difficult matter. The inspector and I were certain that these were the facts.
But what was this creature?
I turned to the chapter in “Assyrian Mythology”—“The Tradition of the Hashishin.”
The legends which the late Professor Deeping had collected relative to this sect of religious murderers were truly extraordinary. Of the cult’s extinction at the time of writing he was clearly certain, but he referred to the popular belief, or Moslem legend, that, since Hassan of Khorassan, there had always been a Sheikh-al-jebal, and that a dreadful being known as Hassan of Aleppo was the present holder of the title.