"I never thought of that," said Bud. "By Zip Foster! I hope nothing like that has happened!"

With anxious hearts they hastened back to the place where Nort had been swept away. They had left the strange lever set to drain the pool, and what state of affairs they would find on returning to their point of digression no one could say.

"Maybe we'll find the water running on into Flume Valley," suggested Nort, who seemed to be almost himself again, except for a feeling of weakness.

"I hope so," spoke Bud.

But this was not the case. On reaching the place where the tunnel branched, they found no water there at all. None was running in the main channel, and none was turning off down the "stem of the T," to use the illustration I first employed.

"Keeps on being strange, doesn't it!" said Bud.

They all agreed with him.

"What's the next move?" asked Dick, as they gazed about, finding their food and supplies safe, and no water, to mention, anywhere about.

"Let's grub!" suggested Snake.

"And make a fire and heat the coffee," urged Bud. "I don't believe the smoke will do any harm, and there's plenty of dry driftwood in the higher places, and on little ledges."