“Rubbish,” he answered, “though it’s true Pharaoh seemed uneasy last night, and that once I woke up and thought I heard footsteps in the court outside.  I set them down to ghosts, in which I have almost come to believe in this haunted place, and went to sleep again.”

“Ghosts be blowed!” said Higgs vulgarly, “if there were such things I have slept with too many mummies not to see them.  That confounded Joshua is the wizard who raises your ghosts.  Look here, old boy,” he added, “let me camp with you to-night, since Quick must be in the tunnel, and Adams has to sleep outside in case he is wanted on the army business.”

“Not a bit of it,” he answered; “you know you are too asthmatical to get a wink in this atmosphere.  I won’t hear of such a thing.”

“Then come and sleep with us in the guest-house.”

“Can’t be done; the Sergeant has got a very nasty job down there about one o’clock, and I promised to be handy in case he calls me up,” and he pointed to the portable field telephone that fortunately we had brought with us from England, which was fixed closed by, adding, “if only that silly thing had another few hundred yards of wire, I’d come; but, you see, it hasn’t and I must be in touch with the work.”

At this moment the bell tinkled, and Orme made a jump for the receiver through which for the next five minutes he was engaged in giving rapid and to us quite unintelligible directions.

“There you are,” he said, when he had replaced the mouthpiece on its hook, “if I hadn’t been here they would probably have had the roof of the tunnel down and killed some people.  No, no; I can’t leave that receiver unless I go back to the mine, which I am too tired to do.  However, don’t you fret.  With a pistol, a telephone, and Pharaoh I’m safe enough.  And now, good night; you fellows had better be getting home as I must be up early to-morrow and want to sleep while I can.”

On the following morning about five o’clock Higgs and I were awakened by some one knocking at our door.  I rose and opened it, whereon in walked Quick, a grim and grimy figure, for, as his soaked clothes and soiled face told us, he had but just left his work in the mine.

“Captain wants to see you as soon as possible, gentlemen,” he said.

“What’s the matter, Sergeant?” asked Higgs, as we got into our garments.

“You’ll see for yourself presently, Professor,” was the laconic reply, nor could we get anything more out of him.

Five minutes later we were advancing at a run through the dense darkness of the underground city, each of us carrying a lamp.  I reached the ruins of the old temple first, for Quick seemed very tired and lagged behind, and in that atmosphere Higgs was scant of breath and could not travel fast.  At the doorway of the place where he slept stood the tall form of Oliver holding a lamp aloft.  Evidently he was waiting for us.  By his side sat the big yellow dog, Pharaoh, that, when he smelt us, gambolled forward, wagging his tail in greeting.