"Step ashore quickly," he cried. "It's beginning to let in water."

"How exciting!" remarked Mavis, as she stepped on to the bank.

"Just wait till I tie her up."

"Where's Jill?" asked Mavis suddenly.

"Isn't she with you?"

"See if she's in the river."

"If she is, the punt striking the bank must have knocked her overboard."

They looked, but no sign could be seen of the dog. Mavis called her name loudly, frantically, but no Jill appeared.

"What shall I do? Oh, what shall I do?" she cried helplessly.

"Look!" cried Perigal suddenly. "Look, those weeds!"