“Oh! Then it—it’s all right.” The injured man settled back.

“I’ll go get some pneumatic pillows,” Mary volunteered.

“Yes, and something hot to drink,” Sparky suggested. “That will help a lot.” Mary was away.

When Don had fully recovered consciousness and had been made as comfortable as possible, they gathered around him for a council of war.

“It’s getting dark,” said Sparky. “In another quarter of an hour it will be darker than a stack of black cats. In this land the dawn comes up like thunder, and the sun blinks out in the same way.”

“And there’s no moon,” said Janet.

“All of which means we’re here for the night,” said Mary. “Sparky,” her voice seemed a little strained. “What kind of a country is this?”

“Good head-hunting country,” Sparky laughed.

“No, but really, we’ve got to face facts,” Mary insisted.

“Truth is,” said Sparky, “I don’t know about the upper waters of the Amazon, or the people who live here. Do the rest of you?”