expressibly painful to Guy, and then
the Greek cried excitedly, "Yes, I hear running water. It comes from the
other side of the cliff."

"Then I am not mistaken," was Guy's joyful exclamation. "We both hear
it. It can be no delusion."

Then his heart sank as he thought of the wall of rock before them.

"It is the outlet of the river," he said bitterly, "only a few yards
distant, and it might as well be a thousand miles."

Remembering what Sir Arthur had told them, he looked anxiously at the
surface of the lake, but the water was calm and quiet, and the raft hung
motionless.

"The outlet is far beneath the surface," said Canaris. "You can tell
that by the sound. If it were near the top we would be instantly sucked
under."

Impelled by an irresistible impulse Guy seized the torch and held it
above his head.

"Look! Look!" he cried, in a voice that trembled with excitement. "The
cliff slants at an angle. There are crevices to hold one's hands and
feet. Make no noise, Canaris; don't wake the rest, but help me to reach
that ledge yonder and I will see where this leads."

The cliff slanted indeed, but at an almost imperceptible angle. The raft
tilted slightly as Canaris pushed Guy up the face of the rock, but the
latter succeeded in reaching a small ledge six feet above the water.

"All right," he whispered. "I can see plenty of places to catch hold of
beyond me. Now fasten a torch to one of the paddles, Canaris, and hold
it as high as you can."

This was a clever suggestion. The Greek fortunately had a bit of cord
about him, and in a moment the torch was throwing a dull light far up
the rugged slope of the rock.

Guy continued to climb higher and higher, keeping a cool head in spite
of his excitement, and testing well each crevice or projecting ledge
before trusting his weight to it, and at last, with a throb of joy that
nearly took his strength away, he pulled himself out upon the flat
summit of the rock.

Seventy feet below him was the raft and its occupants, glowing in the
torchlight. Guy crawled forward on his hands and knees, and soon reached
the verge of the rock on the other side. The running water was below
him, much farther, indeed, than the level of the lake, but the roar of
the torrent was loud and distinct to the ear.

He turned and crawled back.

"Canaris," he whispered down, "I have reached the top of the cliff.
There is running water on the other side. Waken the rest as quickly as
possible,