There the message had ended, as though the speaker, eleven miles above the earth, had been strangled. Yet he didn't drop, as far as anybody in the world knew.

Lucian Jeter and Tema Eyer worked harder than ever, remembering the promise they had made Kress at his take-off. Whatever had happened to him, he seemingly in part had anticipated. And now the partners would go up, too, seeking information—perhaps to vanish as Kress had vanished. They were not afraid. They shared the world's feeling of dread, but they were not afraid. Of course death would end their labors, but there were many scientists in the world to take up where they might leave off.

There were, for example, Sitsumi of Japan, rumored discoverer of a substance capable of bending light rays about itself to render itself invisible; Wang Li, Liao Wu, Yung Chan, of China—three who had degrees from the world's greatest universities and had added miraculously to the store of knowledge by their own inspired research. These three were patriotically eager to bring China back to her rightful place as the leader in scientific research—a place she had not held for a thousand years. It was generally agreed among scientists that the three would shortly outstrip all their contemporaries.

As Jeter thought of these four men, Orientals all, it suddenly occurred to him to communicate with them. He talked it over with Eyer and decided to send carefully worded cables to all four.

In a few hours he received answers to them:

From Japan: "Sitsumi does not care to communicate." There was a world of cold hostility in the words, Jeter thought, and Eyer agreed with him.

From China came the strangest message of all:

"Wang, Liao and Yung have been cut off from world for past four months, conducting confidential research in Gobi laboratories. Impossible to communicate because area in which laboratories situated in Japanese hands and surrounded by cordon of guards."

Jeter and Eyer stared at each other when the cable had been read and digested.

"Queer, isn't it?" said Eyer.