"No," he said. "Regardless of what you may think I don't have vacuum cups on my feet. But how far does that gun of yours carry?"

She stole a glance over the edge. Night was sweeping in. The island was a wall of blackness and the men at its foot were hidden. "You can't see!" she protested.

He squeezed her shoulder. "Oh yes I can, honey. But whether I'm a good enough shot to.... We'll have to try it, that's all."

Her face was a white blur and fear of the unknown put metal in her voice. "Part seal, part cat, part deer, part what else? I don't think you're human, Simon Dalgetty."

He didn't answer. The abnormal voluntary dilation of pupils hurt his eyes.

"What else has Dr. Tighe done?" Her tone was chill in the dark. "You can't study the human mind without studying the body too. What's he done? Are you the mutant they're always speculating about? Did Dr. Tighe create or find homo superior?"

"If I don't plug that radio com-set before they can use it," he said, "I'll be homo-genized."

"You can't laugh it off," she said through taut lips. "If you aren't of our species I have to assume you're our enemy—till you prove otherwise!" Her fingers closed hard on his arm. "Is that what your little gang at the Institute is doing? Have they decided that mere humanity isn't good enough to be civilized? Are they preparing the way for your kind to take over?"

"Listen," he said wearily. "Right now we're two people, very mortal indeed, being hunted. So shut up!"

He took the pistol from her holster and slipped a full clip into its magazine. His vision was at high sensitivity now, her face showed white against the wet rock with gray highlights along its strong cheekbones beneath the wide frightened eyes. Beyond the reefs the sea was gunmetal under the stars, streaked with foam and shadow.