“I think it will be wiser to wait until our heads are free from lessons,” smiled Mr. Whitley. “I, for one, cannot go on any further quest for treasure until I have fulfilled my contract with the Amadale Academy.”

“Well,” said Nicky, the irrepressible, glancing at his friends as, out of the corner of his eye he saw Aunt Lucy within the living room, approaching the window with a big plateful of cakes and a pitcher of lemonade. “Well, I know one thing we can decide on, right now.”

“What?” they all asked him.

Nicky grinned. Gently he began stroking his left ear with the middle finger of that hand. It was the call for a council.

Promptly, and somewhat curiously, Tom, Cliff, Bill and Mr. Whitley sat with folded arms—the sign that they were in readiness.

The Mystery Boys were again in council.

“You’ll promise on the oath, ‘Seeing All, I see nothing: Knowing All, I know nothing: Telling All, I tell nothing’——?”

“Certainly we’ll promise!” said Tom impatiently. “What is it, Nicky?”

“I know!” cried Cliff, as Aunt Lucy stood, smiling, at the window, “We’ve got to decide a great question!”

“What?” asked Bill.