Another instant and with a heavy splash he disappeared in the deep pool under the fall! Wabi and Mukoki had seen the desperate leap and the young Indian was beside the pool before Rod had recovered from his horrified astonishment.

For centuries the water of the chasm stream had been tumbling into this pool wearing it deeper and deeper each year, until the water in it was over a man's head.

In width it was not more than a dozen feet.
"Watch for him! He'll drown if we don't get him out," shouted Wabi.
Rod leaped to the edge of the pool, with Mukoki between him and Wabigoon.

Ready to spring into the cold depths at the first sign of the old man's gray head or struggling arms the three stood with every muscle ready for action.

A second, two seconds, five seconds passed, and there was no sign of him.