"Where on earth had he been?"

"He wouldn't tell me. He was very mysterious. It seems that he had been in the water somehow and was soaking wet; all I could get out of him was that the business had something to do with Mary Adams."

"Mary Adams!" cried Gus. "I thought she wouldn't speak to him."

"Well, I don't know," said Vance. "That was what Bull told me. Anyhow he didn't seem a bit alarmed about his absence."

"The superintendent sent for him this afternoon," put in Murray. "I suppose that was to give him a chance to explain the matter."

"Yes, and I saw Bull with Mary a while ago," added the other, shrewdly. "I shouldn't wonder if Bull were getting up some scheme. He hasn't said much about Mallory to-day. He's been very mysterious."

The mystery, whatever it was, was destined to remain unsolved, however, for just then the rattle of a drum echoed across the field, and the three sprang up hastily.

"It's dress parade," said Murray.

"Yes," responded Vance, dryly. "And now you'll have a chance to show off that beautifully cleaned gun of yours. Come on."