The thieves well knew the tunnels of the highest level and used them often. But the deeper tunnels were shunned even by them; for doubtful, hair-raising rumors circulated of strange cries from these noisome depths, of shambling forms half-glimpsed, and of men who, having dared the deep tunnels, cried out and then vanished forever.
Under Conan's implacable questioning, Metemphoc had reluctantly owned that the deep tunnels might well connect with the dungeons of the Vestibule of the Gods. Still, he had urged Conan to find some more wholesome way into the forbidden citadel. But Conan had proved obdurate to all his well-meant urgings.
At length, Metemphoc had seen that Conan was adamant in his determination to try to rescue his comrades by means of the deep tunnels. With a heartfelt sigh, the fat master thief then called his henchmen into conference. They began to riffle through the archives of the thieves' guild. Ancient maps of the labyrinth of tunnels were unearthed. Conan pored over these, memorizing the twists and turns of the caverns and the landmarks by which he could find his way.
So here was Conan, stalking through the darkness of the deep tunnels, scrambling and leaping over irregularities in the floor of the cavern. In one hand he bore a lantern furnished him by the master thief. This device - a fine example of Antillian technical skill - was a little bronze lamp with a cylindrical reservoir for oil, a spout from which projected a sputtering wick, a disk-shaped reflector of silvered bronze behind the flame, and a handle in back. From long polishing, some of the silver had been worn away from the face of the reflector, revealing the bronze beneath. But the little lamp was still useful for Oman's purposes. It would, Metemphoc had said, burn for several hours before its fuel was exhausted.
Here and there among the branching mouths of the tunnels, a white mark was blazoned against the wet stone. These were the thieves' blazes. Where none was visible, certain odd configurations of stone had been described to him as landmarks - for instance, a humped shape of limestone that looked like a gigantic spider.
Conan moved steadily ahead, though he little liked the cold, damp breeze that wafted upon him from the unseen depths. As he moved, his mind could not help conjuring up strange pictures from the odd sounds that wailed and echoed and whispered about him in the darkness. Now and then he heard a weird, sobbing cry, which rose to a piercing shriek of inhuman agony and died away again to a faint moan, like the wind through distant pines.
At other times, he thought he sensed the stealthy tread of unseen feet about him, in the unlighted mouths of side passages and in the main tunnel behind him. Sometimes whispered words or cold, mocking laughter roused atavistic fears of the supernatural in his barbaric soul - fears which he crushed with iron self-control.
Then, too, there came to his keyed-up senses a soft, slithering sound, as if some titanic worm or slug were crawling over the rough stone floor. Even so seasoned an old warrior as Conan could not help a shiver of revulsion as he thought of what creatures might dwell in these sunless depths, far beneath this forgotten city of Time's Dawn.
The moans and wails, he sternly told himself, were simply the sounds of wind blowing through the mock-forests of limestone formations. The laugh was the gurgle of underground waters, distorted by the conformation of the tunnels. The crawling sound might have been the slow, creaking subsidence of the very earth itself. But still the superstitious fears arose in his mind to plague him.
The skin of Conan's nape prickled. From somewhere, he was conscious of the gaze of unseen eyes. He had been winding his way through the subterranean caverns for - he thought - well over two hours. He had slipped and staggered on wet stones, stumbled over irregularities, leaped ditches and chasms athwart his path, bumped his head on low ceilings, squeezed through narrow places, and scrambled up and down steep slopes. He had disturbed colonies of bats, hanging upside down in clusters from the overhead. They squeaked angrily at him and whirred away into the darkness.
He wondered how much longer his lamp would continue to give light. It seemed to him that already its flame had weakened; it spluttered and wavered, as though its supply of oil were coming irregularly.
And now the barbarian's keen senses, but little blunted and dulled by years of urban life, told him that he was under the surveillance of hidden eyes.