Then a bright flare of the fantastic flame showed me that for which I had been seeking, the opening to those remoter abysses whence the sudden wind had blown; and I grew faint when I saw that it was a small and plainly artificial door chiselled in the solid rock. I thrust my torch within, beholding a black tunnel with the roof arching low over a rough flight of very small, numerous, and steeply descending steps. I shall always see those steps in my dreams, for I came to learn what they meant. At the time I hardly knew whether to call them steps or mere footholds in a precipitous descent. My mind was whirling with mad thoughts, and the words and warnings of Arab prophets seemed to float across the desert from the lands that men know to the nameless city that men dare not know. Yet I hesitated only a moment before advancing through the portal and commencing to climb cautiously down the steep passage, feet first, as though on a ladder.