The droning hum of the helicopter came across the broken ground.
The sun was an hour high when the helicopter appeared to hunt for them by day.
Dirk then stopped the plane and held it poised in the air with the helicopter.
They might throw him in jail or something might happen to the time unit or the helicopter.
The helicopter made a half-turn of the camp and came rapidly to Earth.
The helicopter man pulled the ignition-cord and a rocket began to sputter.
"I'm waiting for that metal to cool off," said the helicopter pilot.
The jets had disappeared, the helicopter was falling rapidly away.
And then he heard the whir of helicopter blades over the building.
As they reached the helicopter, Morely turned, one hand on the door.