His first glance was intuitively directed to the cavity that opened beneath him. He saw immediately that it was less important, both in size and depth, than he had imagined it to be. The earth at this particular place had given way beneath the foundations of the wall, which had sunk down, deepening the chasm by their weight, into the yielding ground beneath them. A small spring of water (probably the first cause of the sinking in the earth) had bubbled up into the space in the brick-work, which bit by bit, and year by year, it had gradually undermined. Nor did it remain stagnant at this place. It trickled merrily and quietly onward--a tiny rivulet, emancipated from one prison in the ground only to enter another in the wall, bounded by no grassy banks, brightened by no cheerful light, admired by no human eye, followed in its small course through the inner fissures in the brick by no living thing but a bloated toad, or a solitary lizard: yet wending as happily on its way through darkness and ruin, as its sisters who were basking in the sunlight of the meadows, or leaping in the fresh breezes of the open mountain side.
Raising his eyes from the little spring, Ulpius next directed his attention to the prospect above him.
Immediately over his head, the material of the interior of the wall presented a smooth, flat, hard surface, which seemed capable of resisting the most vigorous attempts at its destruction; but on looking round, he perceived at one side of him and further inwards, an appearance of dark, dimly-defined irregularity, which promised encouragingly for his intended efforts. He descended into the chasm of the rivulet, crawled up on a heap of crumbling brick-work, and gained a hole above it, which he immediately began to widen, to admit of his passage through. Inch by inch, he enlarged the rift, crept into it, and found himself on a fragment of the bow of one of the foundation arches, which, though partly destroyed, still supported itself, isolated from all connection with the part of the upper wall which it had once sustained, and which had gradually crumbled away into the cavities below.
He looked up. An immense rift soared above him, stretching its tortuous ramifications, at different points, into every part of the wall that was immediately visible. The whole structure seemed, at this place, to have received a sudden and tremendous wrench. But for the support of the sounder fortifications at each side of it, it could not have sustained itself after the shock. The Pagan gazed aloft, into the fearful breaches which yawned above him, with ungovernable awe. His small, fitful light was not sufficient to show him any of their terminations. 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. 'Your servant Ulpius stops not on the journey that leads him to your repeopled shrines! Blood, crime, danger, pain--pride and honour, joy and rest, have I strewn like sacrifices at your altars' feet! Time has whirled past me; youth and manhood have lain long since buried in the hidden Lethe which is the portion of life; age has wreathed his coils over my body's strength, but still I watch by your temples and serve your mighty cause! Your vengeance is near! Monarchs of the world, your triumph is at hand!'
He remained for some time in the same position, looking fixedly up into the trackless darkness above him, drinking in the sounds which-- alternately rising and sinking--still floated round him. The trembling gleam of his lantern fell red and wild upon his livid countenance. His shaggy hair floated in the cold breezes that blew by him. At this moment he would have appeared from a distance, like a phantom of fire perishing in a mist of darkness; like a Gnome in adoration in the bowels of the earth; like a forsaken spirit in a solitary purgatory, watching for the advent of a glimpse of beauty, or a breath of air.
At length he aroused himself from his trance, trimmed with careful hand his guiding lantern, and set forward to penetrate the breadth of the great rift he had just entered.
He moved on in an oblique direction several feet, now creeping over the tops of the foundation arches, now skirting the extremities of protrusions in the ruined brick-work, now descending into dark slimy rubbish-choked chasms, until the rift suddenly diminished in all directions.
The atmosphere was warmer in the place he now occupied; he could faintly distinguish patches of dark moss, dotted here and there over the uneven surface of the wall; and once or twice, some blades of long flat grass, that grew from a prominence immediately above his head, were waved in his face by the wind, which he could now feel blowing through the narrow fissure that he was preparing to enlarge. It was evident that he had by this time advanced to within a few feet of the outer extremity of the wall.
'Numerian wanders after his child through the streets,' muttered the Pagan, as he deposited his lantern by his side, bared his trembling arms, and raised his iron bar, 'the slaves of his neighbour the senator are forth to pursue me. On all sides my enemies are out after me; but, posted here, I mock their strictest search! If they would track me to my hiding-place, they must penetrate the walls of Rome! If they would hunt me down in my lair, they must assail me to-night in the camp of the Goths! Fools! let them look to themselves! I seal the doom of their city, with the last brick that I tear from their defenceless walls!'
He laughed to himself as he thrust his bar boldly into the crevice before him. In some places the bricks yielded easily to his efforts; in others, their resistance was only to be overcome by the exertion of his utmost strength. Resolutely and unceasingly he continued his labours; now wounding his hands against the jagged surfaces presented by the widening fissure; now involuntarily dropping his instrument from ungovernable exhaustion; but, still working bravely on, in defiance of every hindrance that opposed him, until he gained the interior of the new rift.