“No!  I want to find her, that’s all—­and end it.  Just one more chance!”

We searched for an hour before we found the stream of water we sought.  After Harry had bathed his knee and drunk his fill he felt more fit, and we pushed on more rapidly, but still quite at random.

We turned first one way, then another, in the never-ending labyrinth, always in darkness and silence.  We seemed to get nowhere; and I for one was about to give up the disheartening task when suddenly a sound smote our ears that caused us first to start violently, then stop and gaze at each other in comprehension and eager surprise.

“The bell!” cried Harry.  “They are being summoned to the great cavern!”

It was the same sound we had heard twice before; a sound as of a great, deep-toned bell ringing sonorously throughout the passages and caverns with a roar that was deafening.  And it seemed to be close—­quite close.

“It came from the left,” said Harry; but I disagreed with him and was so sure of myself that we started off to the right.  The echoes of the bell were still floating from wall to wall as we went rapidly forward.  I do not know what we expected to find, and the Lord knows what we intended to do after we found it.

A short distance ahead we came to another passage, crossing at right angles, broad and straight, and somehow familiar.  As with one impulse we took it, turning to the left, and then flattened ourselves back against the wall as we saw a group of Incas passing at its farther end, some two hundred yards away.

There we stood, motionless and scarcely breathing, while group after group of the savages passed in the corridor ahead.  Their number swelled to a continuous stream, which in turn gradually became thinner and thinner until only a few stragglers were seen trotting behind.  Finally they, too, ceased to appear; the corridor was deserted.

We waited a while longer, then as no more appeared we started forward and soon had reached the corridor down which they had passed.  We followed in the direction they had taken, turning to the right.

We had no sooner turned than we saw that which caused us to glance quickly at each other and hasten our step, while I smothered the ejaculation that rose to my lips.  The corridor in which we now found ourselves stretched straight ahead for a distance, then turned to one side; and the corner thus formed was flooded with a brilliant blaze of light!

There was no longer any doubt of it:  we were on our way to the great cavern.  For a moment I hesitated, asking myself for what purpose we hastened on thus into the very arms of our enemies; then, propelled by instinct or premonition—­I know not what—­I took a firmer grasp on my spear and followed Harry without word, throwing caution to the winds.

Yet we avoided foolhardiness, for as we approached the last turn we proceeded slowly, keeping an eye on the rear.  But all the Incas appeared to have assembled within, for the corridor remained deserted.