But Huyghens turned on the receiver. There came the whispering, scratchy sound of background-noise. Then the signal. Three dots, three dashes, three dots. Three dots, three dashes, three dots. It went on and on and on. Huyghens turned it off. Roane said:
"Shouldn't we have answered that signal before we left the station? To encourage them?"
"I doubt they have a receiver," said Huyghens. "They won't expect an answer for months, anyhow. They'd hardly listen all the time, and if they're living in a mine-tunnel and trying to sneak out for food to stretch their supplies—why, they'll be too busy to try to make complicated recorders or relays."
Roane was silent for a moment or two.
"We've got to get food for the bears," he said presently. "Nugget's weaned, and he's hungry."
"We will," Huyghens promised. "I may be wrong, but it seems to me that the number of sphexes climbing the mountain is less than yesterday and the day before. We may have just about crossed the path of their migration. They're thinning out. When we're past their trail, we'll have to look out for night-walkers and the like again. But I think they wiped out all animal life on their migration-route."
He was not quite right. He was waked in darkness by the sound of slappings and the grunting of bears. Feather-light puffs of breeze beat upon his face. He struck his belt-lamp sharply and the world was hidden by a whitish film which snatched itself away. Something flapped. Then he saw the stars and the emptiness on the edge of which they camped. Then big white things flapped toward him.
Sitka Pete whuffed mightily and swatted. Faro Nell grunted and swung. She caught something in her claws. She crunched. The light went off as Huyghens realized. Then he said:
"Don't shoot, Roane!" He listened, and heard the sounds of feeding in the dark. It ended. "Watch this!" said Huyghens.