As soon as breakfast was over and the ranks were broken, they put on their overcoats and went out in search of Don. They found him in a very few minutes, for he was also looking for them. He was just as anxious to know why he had been challenged while the other members of the party were allowed to pass, as they were to ascertain how he had got back to his room. Before any of the three could speak, Dick Henderson came rushing up.

“O, boys!” he began.

“That will do for the present, Bub,” interrupted Duncan.

“Run away now, like a good little boy.”

“But I say, fellows,” exclaimed Dick.

“Well, say it some other time. We are busy just now.”

“Let him speak,” said Don. “I want him to tell why he stopped me this morning.”

“I didn’t stop you,” replied Dick.

“That’s a fact, you didn’t. But you tried to all the same, and I want to know what you meant by it.”

“Why, Gordon, it can’t be possible that you were—eh?”