By Randall Garrett

[Transcriber's Note: This etext was produced from

Imagination Stories of Science and Fantasy

February 1957

Extensive research did not uncover any evidence that

the U.S. copyright on this publication was renewed.]

"We're in a hell of a jam, Brek," the Councillor said. "If Sagginer

isn't stopped, he'll change history. The situation's desperate."

Time Patrolman Brek Halliday nodded in agreement. It _was_ a tense

situation. Time travel, he knew, was possible only so long as the

traveller into the past did nothing that would change history

significantly; the time-stream itself would straighten out little

changes in the past so that overall history would remain the same.

But a big change was something else again. If you stick your finger in

a river, there are a few ripples around it, but the flow of the river

remains the same. If you build a dam, though....

"_When_ is he?" Brek asked. "Do we know?"

"Fortunately, yes. He forced one of our operators to use one of the

chronokinetic projectors, and then kidnapped her and took her with him.

But he didn't know that the power drain was measurable and had been

recorded on the meters. We know how much energy he used, so we know how

far into the past he went. We've got him pinpointed in the area of the

old United States, somewhere between 1880 and 1895."

"Who was the girl he kidnapped?" Brek asked.

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