estrain themselves from leaping off the boards into the cool,
glassy depths below.

"Here comes Miss Armstrong!" shouted somebody at the other end of the
dock, as the big Australian came into view down the path, and there was
a scramble for the diving tower.

The swimming place at Camp Keewaydin was divided into three parts. A
shallow cove at the left of the dock, where the curve of the river
formed a tiny bay, was the sporting ground of the Minnows, the girls who
could not swim at all; the Perch, or those who could swim a little, but
were not yet sure of themselves, were assigned to the other side of the
dock, where the water was slightly deeper, but where they were protected
by the dock from the full force of the current; while the Sharks, the
expert swimmers, were given the freedom of the river beyond the end of
the pier. The diving tower was on the end of the pier and belonged
exclusively to the Sharks; it was fifteen feet high, and had seven
different diving boards placed at various heights. Besides the diving
tower, there was a floating dock anchored out in midstream, having a
springboard at either end. There was also a low diving board at the side
of the pier for the Perch to practice on.

Miss Armstrong came down on the dock in a bright red bathing suit which
shone brilliantly among the darker suits of the girls. She rapidly
separated the Minnows from the other fish, and set them to learning
their first strokes under the direction of one of the other councilors.
Then she lined the remaining girls up for the test which would determine
who were Sharks and who were Perch. The test consisted of a dive from
any one of the diving boards of the tower and a demonstration of four
standard strokes, ending up with a swim across the river and back.

About a dozen dropped out at the mere reading of the test and accepted
their rating as Perch without a trial; as many more failed either to
execute their dives properly or to give satisfaction in their swimming
strokes. Sahwah, burning with impatience to show her skill, climbed
nimbly up to the very top of the tower and went off the highest
springboard in a neat back dive that drew applause from the watchers,
including Miss Armstrong. She also passed the rest of the test with a
perfect rating.

"You're the biggest Shark so far," remarked Miss Armstrong, as Sahwah
clambered up on the dock after her swim across the river, during which
she had almost outdistanced the boat whic