They looked, as he beheld them in dark relief against the rest of the hollow part of the wall, like mighty serpents twining their desolating path right upward to the ramparts above; and he, himself, as he crouched on his pinnacle with his little light by his side, was reduced by the wild grandeur, the vast, solemn gloom of the obscure, dusky, and fantastic objects around him, to the stature of a pigmy.

Could he have been seen from the ramparts high overhead, as he now peered down behind his lantern into the cavities and irregularities below him, he would have looked, with his flickering light, like a mole led by a glow-worm.
He paused to consider his next movements.

In a stationary position, the damp coldness of the atmosphere was almost insupportable, but he attained a great advantage by his present stillness: he could listen undisturbed by the noises made by the bricks which crumbled from under him, if he advanced.
Ere long, he heard a thin, winding, long-drawn sound, now louder, now softer; now approaching, now retreating; now verging towards shrillness, now quickly returning to a faint, gentle swell.

Suddenly this strange unearthly music was interrupted by a succession of long, deep, rolling sounds, which travelled grandly about the fissures above, like prisoned thunderbolts striving to escape.

Utterly ignorant that the first of these noises was occasioned by the night wind winding through the rents in the brick of the outer wall beyond him; and the second, by the echoes produced in the irregular cavities above, by the footfall of the sentries overhead--roused by the influence of the place, and the mystery of his employment, to a pitch of fanatic exaltation, which for the moment absolutely unsteadied his reason--filled with the frantic enthusiasm of his designs, and the fearful legends of invisible beings and worlds which made the foundation of his worship, Ulpius conceived, as he listened to the sounds around and above, that the gods of antiquity were now in viewless congregation hovering about him, and calling to him in unearthly voices and in an unknown tongue, to proceed upon his daring enterprise, in the full assurance of its near and glorious success.
'Roar and mutter, and make your hurricane music in my ears!' exclaimed the Pagan, raising his withered hands, and addressing in a savage ecstacy his imagined deities.