Suddenly he was able to recite, word for word, the first page from a book he had read ten years ago.

"The hormones," he whispered. "Darling's hormones!"

Hormones that did something to his brain. Speeded it up, made it work better, made more of it work than had ever worked before. Made it think cleaner and clearer than it had ever thought before.

"Good Lord," he said.

A head start to begin with. And now this!

The man who has it could rule the Solar System. That was what Belden had said about it.

Belden had hunted for it. Had torn this place apart. And Darling had hunted for it, too. Darling, who had thought he had it, who had played a trick on Nevin and Cartwright so he could be sure he had it, who had drank himself to death trying to find the bottle he had it in.

And all these years the hormones had been in this bottle on the mantel!

Someone else had played a trick on all of them. Langdon, maybe. Langdon, who had been given away as a pet to a thing so monstrous that even Cartwright had shrunk from naming it.

With shaking hand, West put the bottle back on the mantel, placed the cork beside it. For a moment he stood there, hands against the mantel, gripping it, staring out the vision port beside the fireplace. Staring down into the valley where a shadowy cylinder tilted upward from the rocky planet, as if striving for the stars.