CHAPTER XXXI

THE SEARCH Long blasts and short blasts did Old Sam blow on the mellow conch horn as, with his lips pressed to the opening, he puffed out his cheeks. Now the sound would almost die away, to blare out again with a suddenness that startled the girls. "What--what does it mean?" faltered Sylvia. "It sounds like something I heard when once I was in Scotland," commented Mrs. Brownley. "An old chieftain thus summoned the members of his clan." "It's the general alarm," explained Harry. "The guides have a way of signalling …