In the sarcophagus-chamber Belzoni discovered a contrivance of the same kind as that which had failed to stop him almost upon the threshold of the tomb. The sarcophagus of oriental alabaster was in place, but empty; the lid had been raised and broken.[251] From the sound given out by the floor when struck the explorer perceived that there must be a hollow space under the base of the sarcophagus. He cut a hole and brought to light the first steps of a staircase, which led to an inclined plane by which the interior of the mountain was deeply penetrated. A wall had been raised at the foot of these steps, beyond which a settlement of the superincumbent rock put an end to all advance after a distance of fifty-one yards had been traversed. Is it not possible that Belzoni only discovered a false sarcophagus, placed to deceive unbidden visitors like himself, and that the mummy was deposited, and still lies, in a chamber at the end of this corridor? The point at which the fallen rock arrested his progress is four hundred and eighty-three feet from the external opening, and about one hundred and eighty below the level of the valley. At such a depth, in these narrow and heated galleries, where there is no ventilation and where the smoke of the torches rapidly becomes stifling, it is not astonishing that, in spite of his admirable perseverance, Belzoni held his hand before completing the exploration.[252] [251] This beautiful sarcophagus is now in the Soane Museum.--ED. [252] Belzoni believed that this passage led again into the open air; that it was, in fact, another entrance to the tomb. "I have," he says, "reasons to think so;" but he does not give his reasons.