“Good Lord, of course it is,” he said. “And tonight we shall know if it’s a good guess or a bad one.”

Bill brightened up suddenly.

“Tonight,” he said. “I say, tonight’s going to be rather fun. How do we work it?”

Antony was silent for a little.

“Of course,” he said at last, “we ought to inform the police, so that they can come here and watch the pond tonight.”

“Of course,” grinned Bill.

“But I think that perhaps it is a little early to put our theories before them.”

“I think perhaps it is,” said Bill solemnly.

Antony looked up at him with a sudden smile.

“Bill, you old bounder.”