that it might be an attack by the roboes on the nerve center of their opposition, he leaped to his feet. A soldier came running up. "Sir," he gasped, "You're wanted in the conference room immediately."

Again it was the same group; Dr. Stone; the Under-Secretary with a worried frown; a raging General Adams, and several aides. The Under-Secretary noted his arrival with nothing more than tightened lips as he announced, "I have just been informed that the only two space ships in existence have been stolen by the roboes."

"Stolen!" exclaimed Stone.

"Impossible," objected Don; "they'd have to be flown away and the fuel hasn't yet been produced."

"You're wrong, as usual," snapped the general. "They were loaded with ordinary rocket fuel for testing purposes and blasted off."

"Were they tracked?" inquired Dr. Stone, anxiously. "Why the loss of the two ships will set us back at least five years in space exploration."

"They were tracked, but they flew low over the Pacific and were lost," snapped the general. "Missiles are ready even now so that if they attempt to escape into space they'll be instantly destroyed."

"Where could they conceivably have gone to, General?" asked the Under-Secretary.

"We suspect some remote section of South America; the entire Air Force is even now sectoring the entire continent. Africa will come next."

"Even more serious," added the Under-Secretary, "small raids have been made at various factories and central intelligence has deduced that they plan on leaving Earth. In one instance they took nothing but seeds and fertilizers and tools suitable for colonization-farming."

"Still, they could hardly hope to escape Earth without the new fuel unless they'd developed one of their own," argued Stone.

"How long did it take you and your assistant?" asked the Under-Secretary.

"Approximately two and one-half years."

"Did any of the roboes assist in any matter, other than testing finished fuels or doing menial tasks?"

"No, only Donald and myself have ever seen any portion of the formula only recently perfected. And, it's entirely safe within the inner room you were recently in."

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