"Okay," he said. "But you are making me a lot of trouble. By insisting, I mean."
"How?"
"Watch," he said. He drove the "time-space" ship back towards the "past", and stopped it previous to the explosion. He plied the projector in the operating chamber of the cyclotron, and two people solidified and came to the unreal world. "Meet Calvin and Laurie Blaine," said Ackerman.
Tansie gulped and sat down hard.
Calvin Blaine blinked and said: "How did this come to be?"
Ackerman shook his head tiredly. He handed Blaine the several sheets of typescript. "Here," he said. "This gives you enough information for a beginning. Once you grasp the situation, you are to do the job outlined on the last four pages."
He turned to Tansie. "Drive the ship to Barry Ford's world, while I try to explain what's to be done."
"What are you going to do?" she asked him.
"There's some strings still untied," smiled Ackerman, who was now master of the situation and worthy of the name of Great Physicist. "The Blaines are going to build me my laboratory!"
He left Calvin and Laurie in the familiar woods of Wisconsin on the other world, complete with his projector and the plans. Then down through the "time-space" he and Tansie went, on that world, to an era which Ackerman knew to be the critical "time".