The Third Warning: “A Mystery Story for Girls”

“Look, Dave. See those strange clouds?” Florence Huyler shaded her eyes to look away toward the horizon. Her face wore an expression of bewildered curiosity. “Yes, I see them. They are queer!” young “Captain Davie,” as everyone called him, replied as he wrinkled his brow. After giving the wheel of his motor-driven craft a turn, he studied those clouds. “Scurrying along the horizon,” he murmured, “they roll quite a bit, don’t they?” “Yes, and such a peculiar shade of yellow,” Florence added. “Oh well, clouds are different up here on Lake Superior.” “Nothing to worry about, I guess,” said Dave, as once again he gave his attention to the wheel. As for Florence, at the moment she had nothing to do but think. And such bitter-sweet thoughts as they were! She was cruising on Lake Superior. That was grand! She had always loved the water. What was still more magnificent, she was landing twice a week on the shores of that place of great enchantment—Isle Royale. Then she breathed a sigh of relief...