The _imám_, in his soft, musical voice, was reciting that chapter of the Korân called "The Angel." The weird ceremony had begun. In order to achieve my purpose I perceived that I should have to draw myself right up to the narrow embrasure and rest my weight entirely upon the ledge of the window. There was little danger in the maneuver, provided I made no noise; for the hanging lamp, by reason of its form, cast no light into the upper part of the room. As I achieved the desired position I became painfully aware of the pungency of the perfume with which the apartment was filled. Lying there upon the ledge in a most painful attitude, I wriggled forward inch by inch further into the room, until I was in a position to use my right arm more or less freely. The preliminary prayer concluded, the measuring of the perfumes had now actually commenced, and I readily perceived that without recourse to the parchment, from which the Lady Zuleyka never once removed her hands, it would indeed be impossible to discover the secret. For, consulting the ancient prescription, she would select one of the gold-stoppered bottles, unscrew it, direct that so many grains should be taken from it, and never removing her gaze from Mohammed er-Rahmân whilst he measured out the correct quantity, would restopper the vessel and so proceed. As each was placed in a wide-mouthed glass jar by the perfumer, Abû Tabâh, extending his hands over the jar, pronounced the names: "Gabraîl Mikaîl, Israfîl, Israîl." Cautiously I raised to my eyes the small but powerful opera-glasses to procure which I had gone to my rooms at Shepheard's. Focussing them upon the ancient scroll lying on the table beneath me, I discovered, to my joy, that I could read the lettering quite well. Whilst Abû Tabâh began to recite some kind of incantation in the course of which the names of the Companions of the Prophet frequently occurred, I commenced to read the writing of Avicenna. "In the name of God, the Compassionate, the Merciful, the High, the Great...." So far had I proceeded and no further when I became aware of a curious change in the form of the Arabic letters. They seemed to be moving, to be cunningly changing places one with another as if to trick me out of grasping their meaning! The illusion persisting, I determined that it was due to the unnatural strain imposed upon my vision, and although I recognized that time was precious I found myself compelled temporarily to desist, since nothing was to be gained by watching these letters which danced from side to side of the parchment, sometimes in groups and sometimes singly, so that I found myself pursuing one slim Arab A (_'Alif_) entirely up the page from the bottom to the top where it finally disappeared under the thumb of the Lady Zuleyka!