right direction. He placed
the second can at that opening and went into the passage formed by a
series of stalagmite columns. It was a dead end. He returned to the cave
where he had left the cans, picked up the empty meat can, and tried
another entry.

He was completely calm now. He knew that humans, even though enemies,
were not far away. And he was quite sure that his friends were all
right. They would take steps to leave a trail so they would not get lost
as he had done.

The second passage was better. He wound in and out through the limestone
formations, leaving a trail of broken cracker crumbs. Every now and then
he turned to see that the trail was plain. He grinned. Hadn't he read a
story when he was a kid about some children who had left a trail of
crumbs only to have the birds eat them?

No danger of that here. No self-respecting bird would get near the
place.

It wasn't long before he ran out of crumbs. Then he tore his
handkerchief into tiny bits and used that. When he reached the end of
the cloth scraps, he sat down to rest, turning off the infrared light
while he carefully shredded a big piece of his shirttail.

As his eyes adjusted themselves to the darkness, he saw the yellow light
again, only stronger this time! Carefully, his heart beating excitedly,
he turned the infrared light in the direction of the yellow glow and
switched it on. Before him was a big opening in the limestone. He
surveyed the floor carefully and saw that there was nothing over which
to trip. He turned off the infrared light, and, leaving a trail of torn
cloth behind him, he crawled toward the source of the light.

He came out on the shore of the lake once more. Before him stretched the
black water, the yellow light dancing across its surface. And the source
of the light was not from candles, but from torches!

Across the water, perhaps a hundred yards away, a half dozen torches
burned, their light lost in the emptiness of the great lake cave. Near
the torches he could see figures moving and knew with sudden relief that
he had found the enemy camp.

He turned on the infrared light, aiming it at the torches, and through
his special glasses he saw the scene light up.

Where the torches blazed was a great shelf of rock, stretching back
several hundred feet to where the rock wall began once more. On the
shelf were a dozen men, sitting around a tiny cooking fire much paler
than the torches themselves. They were Tibetans, like th