Then, accompanied by St. Just, they plunged in single file into the jungle of foliage that grew around the rock, and was so tangled and interlaced that progress was very difficult, and no one who did not know of the path they followed could have found it. In about an hour, at the cost of numerous tears and scratches, they emerged on a small clearing, in which was a mound of sand, with a slab of stone before it. Two of the strongest men were ordered to roll away this stone; and, this done, an opening about two feet square was seen.

Then, at a few words from the Sheik, each man went down upon his hands and knees, and, one by one, they crawled through the hole and in utter darkness began to traverse a passage that led from it.

They had proceeded but a few yards, when, all at once, the man immediately in front of St. Just called out in Arabic "Take care." In a moment, the young Frenchman felt himself gliding down a slope. He clutched at the bare earth with his hands, one of which held his unlighted torch, and managed, with an occasional slip and scratch and scramble and bump, so far to check his progress that, when he presently dropped two or three feet on to level ground, he was not much hurt.

When he looked about him, he saw that those of the party who were in advance of him were occupied in lighting their torches. He lighted his from one of theirs. One after another the remainder of the party scrambled down; when all the torches had been lighted, St. Just found that they were in a square hall, hewn out of the solid rock, the sides of which were sculptured in the Assyrian and Egyptian style.

It was but a passing glance that he could give, for, so soon as the whole party was assembled and the torches had been lighted, the word was given to move forward. They traversed the rocky road for upwards of two miles, now leaping over fallen boulders, now climbing great blocks of masonry, till, at last, they halted before a wondrous sight.

For the last quarter of a mile—so far as St. Just could judge, they had been going down an easy incline, and their course had been free from obstacles. Another thing he noticed and could not account for was that, as they neared their present halting place, the way in front of them became gradually lighter until finally their torches were no longer needed. By the time they had come to a stand-still, the source of this light was no longer a mystery. Opposite to them at a distance that was difficult to calculate in their present environment, but quite near enough for them to feel its heat, was a vast crater, that was belching out flames and steam and streams of boiling lava. The whole of the space between this volcano and St. Just and his companions was occupied by a city in ruins, that lay in a basin about three hundred feet below the watchers, who were standing on a platform to which the passage they had just traversed led. The light from the crater and the molten lava that was being spouted from it and was streaming down upon the subterranean city, enabled them to distinguish what remained of the buildings; but was not sufficiently diffused to show the sides or roof of the enormous cavern in which they were, so that it was impossible to estimate its size.

Transfixed with astonishment, St. Just watched the stream of melted lava vomited forth from the glowing chasm and rush along in a fiery channel, crackling and hissing and bubbling into a sort of caldron, whence it spread out into a sheet and poured down upon the deserted city, sending up a noisome vapor that no living creature could breathe for long. The whole scene was enough to strike terror into the boldest heart, and St. Just, courageous as he was, felt his own quake and his legs beneath him tremble.

Presently the old Sheik touched him and called his attention to an obelisk that was reared on the platform on which they stood.

It was covered with inscriptions, almost undecipherable through age. But the old Sheik interpreted them to St. Just as follows:

"In the sixth year of the founding of this city (this would mean about 2600 B.C.) was this built for the river and for the traders thereon; wherein is it possible to shelter our ships. And in this same year was the road from the City to the Ancient tomb by the Nile Bank finished in a manner worthy of those who built this city. This monument has been erected as a memorial of the same."