I have never experienced an identical sensation since, but I seemed to be audient of a sort of psychic patrol, which, from a remote _pianissimo_, swelled _fortissimo_, to an intimate but silent clamor, which beat in some way upon my brain, but not through the faculty of hearing, for now the night was deathly still. Yet I was persuaded of some _approach_--of the coming of something sinister, and the suspense of waiting had become almost insupportable, so that I began to accuse my Spartan supper of having given me nightmare, when the tent-flap was suddenly raised, and, outlined against the paling blue of the sky, with a sort of reflected elfin light playing upon her face, I saw an Arab girl looking in at me! By dint of exerting all my self-control I managed to restrain the cry and upward start which this apparition prompted. Quite still, with my fists tightly clenched, I lay and looked into the eyes which were looking into mine. The style of literary work which it has been my lot to cultivate fails me in describing that beautiful and evil face. The features were severely classical and small, something of the Bisharîn type, with a cruel little mouth and a rounded chin, firm to hardness. In the eyes alone lay the languor of the Orient; they were exceedingly--indeed, excessively--long and narrow. The ordinary ragged, picturesque finery of a desert girl bedecked this midnight visitant, who, motionless, stood there watching me. I once read a work by Pierre de l'Ancre, dealing with the Black Sabbaths of the Middle Ages, and now the evil beauty of this Arab face threw my memory back to those singular pages, for, perhaps owing to the reflected light which I have mentioned, although the explanation scarcely seemed adequate, those long, narrow eyes shone catlike in the gloom. Suddenly I made up my mind. Throwing the blanket from me, I leapt to the ground, and in a flash had gripped the girl by the wrists. Confuting some lingering doubts, she proved to be substantial enough. My electric torch lay upon a box at the foot of the bed, and, stooping, I caught it up and turned its searching rays upon the face of my captive. She fell back from me, panting like a wild creature trapped, then dropped upon her knees and began to plead--began to plead in a voice and with a manner which touched some chord of consciousness that I could swear had never spoken before, and has never spoken since. She spoke in Arabic, of course, but the words fell from her lips as liquid music in which lay all the beauty and all the deviltry of the "Siren's Song." Fully opening her astonishing eyes, she looked up at me, and, with her free hand pressed to her bosom, told me how she had fled from an unwelcome marriage; how, an outcast and a pariah, she had hidden in the desert places for three days and three nights, sustaining life only by means of a few dates which she had brought with her, and quenching her thirst with stolen water-melons.