"I'm not so sure," she said. "You've gone past the two and a half mile line from the generator. From what that Graylock monster said, you should have started to pick up its effects. Why not take your shot, and play safe?"

"No," Dasinger said. "If I wait until I feel something that can be definitely attributed to the machine, I can keep the kwil dose down to what I need. I don't want to load myself up with the drug any more than I have to."

A stand of tall trees with furry trunks moved presently into range of the glasses, thick undergrowth beneath. Dasinger picked his way through the thickets with some caution. The indications so far had been that local animals had as much good reason to avoid the vicinity of Hovig's machine as human beings, but if there was any poisonous vermin in the area this would be a good place for it to be lurking. Which seemed a fairly reasonable apprehension. Other, equally definite, apprehensions looked less reasonable when considered objectively. If he stumbled on a stone, it produced a surge of sharp alarm which lingered for seconds; and his breathing had quickened much more than could be accounted for by the exertions of the downhill climb.

Five minutes beyond the wood Dasinger emerged from the mouth of a narrow gorge, and stopped short with a startled exclamation. His hand dug hurriedly into his pocket for the case of kwil needles.

"What's the matter?" Duomart inquired sharply.

Dasinger produced a somewhat breathless laugh. "I've decided to take the kwil. At once!"

"You're feeling ... things?" Her voice was also shaky.

"I'll say! Not just a matter of feeling it, either. For example, a couple of old friends are walking towards me at the moment. Dead ones, as it happens."

"Ugh!" she said faintly. "Hurry up!"

Dasinger shoved the needle's plunger a quarter of the way down on the kwil solution, pulled the needle out of his arm. He stood still for some seconds, filled his lungs with the cool night air, let it out in a long sigh.

"That did it!" he announced, his voice steadying again. "The stuff works fast. A quarter shot...."

"Why did you wait so long?"

"It wasn't too bad till just now. Then suddenly ... that generator can't be putting out evenly! Anyway, it hit me like a rock. I doubt you'd be interested in details."