"Hello the boat!" cried a voice from the aviator's seat.
"Hello, Ned!" all three boys called back.
"How do you know it's Ned?" was asked.
"We saw that beautiful face of yours in the red fire," replied Jack. "How are we going to get out of here? They've blockaded the river below, and the falls are above."
"I presume I have dynamite enough to blow up that improvised dam," replied Ned. "Why didn't you do it?"
Before Jack could explain the situation, the Nelson drifted past, and he knew that his voice would not carry to her.
"I'm going to open up now," Harry said, as the Nelson drifted out of range of the glass pane. "I'm pretty near choked in here."
"Nice time we would have had in the Wolf," laughed Jack.
"Anyway," urged Harry, "we should have been in her in a minute if the Nelson hadn't shown up. Say, won't they give us the laugh in New York? Came away off out here alone, and then had to be rescued by Ned!"
Very cautiously the panels giving on the stern were opened. There were no savages in view. The banks of the stream seemed as quiet and harmless as a thicket in Central Park.