Tide was low when they started. They had nearly three miles to
walk. The pools in front of Deal and Walmer had often been searched,
but they hoped that once round the Foreland they might light upon
specimens differing from any which they had hitherto found. For
some hours they searched the pools, retiring as the tide advanced.
Then they went up to the foot of the cliffs, and sat down to open
their cans and compare the treasures they had collected. The spot
which they had unwittingly selected was a little bay. For a long
time they sat comparing their specimens. Then Frank said, "Come
along, it is time to be moving."

As he rose to his feet he uttered an exclamation of dismay. Although
the tide was still at some little distance from the spot where they
were sitting, it had already reached the cliffs extending out at
either end of the bay. A brisk wind was blowing on shore, and the
waves were already splashing against the foot of the rocks.

The whole party leaped to their feet, and seizing their cans ran
off at the top of their speed to the end of the bay.

"I will see how deep the water is," Frank exclaimed; "we may yet
be able to wade round."

The water soon reached Frank's waist. He waded on until it was up
to his shoulders, and he had to leap as each wave approached him.
Then he returned to his friends.

"I could see round," he said, "and I think I could have got round
without getting into deeper water. The worst of it is the bottom
is all rocky, and I stumbled several times, and should have gone