"Did you hear that, Nell?"
"Yes. What was it?"
"It was a signal from White Buffalo. He is waiting to assist us."
"Oh!" cried the little miss, and her voice was full of joy. "Good, dear White Buffalo!"
Dave was now straining his eyes to pierce the darkness. Suddenly a vivid flash of lightning lit up the whole lake. Another flash followed, and then came two rifle shots in rapid succession, and a bullet sang so close to the youth's ear that he dropped his paddle.
"Our escape has been discovered!" he muttered, and picked up the paddle again. "Get down, Nell, and keep the twins down, too."
"Oh, Dave, they may shoot you."
"I'll have to risk it. We are pretty close to shore now," he answered.
Ahead a light was flaring up. It moved in a circle and then up and down and then vanished. It was a signal from White Buffalo. Dave steered the canoe straight for the spot.
"My white brother Dave!" came a cry from the shore, and White Buffalo ran into view and aided in beaching the canoe. "And my little Nell!"