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.
He referred to the fact that De Sacy has shown the word Assassin to be derived from Hashishin, and quoted El-Idrisi to the same end. The Hashishin performed their murderous feats under the influence of hashish, or Indian hemp; and during the state of ecstasy so induced, according to Deeping, they acquired powers almost superhuman. I read how they could scale sheer precipices, pass fearlessly along narrow ledges which would scarce afford foothold for a rat, cast themselves from great heights unscathed, and track one marked for death in such a manner as to remain unseen not only by the victim but by others about him. At this point of my studies I started, in a sudden nervous panic, and laid my hand upon my revolver.
I thought of the eyes which had seemed to look up from the black well of the staircase — I thought of the horrible end of this man whose book lay upon the table … and I thought I heard a faint sound outside my study door!
The key of Deeping's safe, and his letter to me, lay close by my hand. I slipped them into a drawer and locked it. With every nerve, it seemed, strung up almost to snapping point, I mechanically pursued my reading.
"At the time of the Crusades," wrote Deeping, "there was a story current of this awful Order which I propose to recount. It is one of the most persistent dealing with the Hashishin, and is related to-day of the apparently mythical Hassan of Aleppo. I am disposed to believe that at one time it had a solid foundation, for a similar practice was common in Ancient Egypt and is mentioned by Georg Ebers."
My door began very slowly to open!
Merciful God! What was coming into the room!