"What do you make of it, Dick?" Dave asked.
"Just as much as you fellows do—-no more," came the reply.
"If it isn't anything that carries danger to us," proposed Darrin, "we may as well go back and to bed."
"All who are sleepy enough may go back and turn in," Prescott suggested. "I'll stay up and watch for a while."
"So will I," promised Reade.
But it turned out that none of the party wanted to sleep. Even Darrin said he was interested enough in this newest mystery to stay up and try to fathom it.
"Whatever it is," smiled Dick, "it hasn't done us any harm."
"Oh, yes; there has been one casualty, at least," protested Holmes.
"The explosion has caused a compound fracture in my bump of curiosity."
"There don't seem to be any more explosions," suggested Dick Prescott, after a few moments had passed, and some of the boys were yawning. "Anyone want to turn in?"
No one wished to do so, however.