But there was no response to it. Calhoun waited a reasonable time.
Then he shrugged and seated himself at the control board.

"It isn't easy," he observed, "to persuade desperate men that they've
outsmarted themselves! Hold hard, Murgatroyd!"

The rockets bellowed. Then there was a tremendous noise to end all
noises, and the ship began to climb. It sped up and up and up. By the
time it was out of atmosphere it had velocity enough to coast to clear
space and Calhoun cut the rockets altogether.

He busied himself with those astrogational chores which began with
orienting oneself to galactic directions after leaving a planet which
rotates at its own individual speed. Then one computes the overdrive
course to another planet, from the respecting coordinates of the world
one is leaving and the one one aims for.

Then, in this case at any rate, there was the very finicky task of
picking out a fourth-magnitude star of whose planets one was his
destination. He aimed for it with ultra-fine precision.

"Overdrive coming," he said presently. "Hold on!"

Space reeled. There was nausea and giddiness and a horrible sensation
of falling in a wildly unlikely spiral. Then stillness, and solidity,
and the blackness outside the Med Ship. The little craft was in
overdrive again.

After a long while, the girl Maril said uneasily, "I don't know what