He watched for a chance to get back on the road, having delivered his warning.  Lockley got out of his car and went over, “You’re talking about the thing that came down from the sky,” he said grimly.  “There was a girl up at the camp.  Jill Holmes.  Writing a piece about building a national park.  Getting information about the job.  Did anybody get her away?”

The man who’d warned him continued to watch for a reasonable gap in the flood of racing cars.  They weren’t crowded now as they had been, but it was still impossible to start in low and get back in the stream of vehicles without an almost certain crash.  Then he turned his head back, staring at Lockley.

“Hell!  Somebody told me to check on her.  I was routing men out and loading ’em on whatever came by.  I forgot!”

A man in the back of the sedan said, “She hadn’t left when we did.  I saw her.  But I thought she had a ride all set.”

The man at the wheel said furiously, “She hasn’t passed us!  Unless she’s in one of these....”

Lockley set his teeth.  He watched each oncoming car intently.  A girl among these fugitives would have been put with the driver in the cab of a truck, and he’d have seen a woman in any of the private cars.

“If I don’t see her go by,” he said grimly, “I’ll go up to the camp and see if she’s still there.”

The man in the driver’s seat looked relieved.

“If she’s left behind, it’s her fault.  If you hunt for her, make it fast and be plenty careful.  Keep to the camp and stay away from the lake.  There was a hell of an explosion over there this morning.  Three men went to see what’d happened.  They didn’t come back.  Two more went after ’em, and something hit them on the way.  They smelled something worse than skunk.  Then they were paralyzed, like they had hold of a high-tension line.  They saw crazy colors and heard crazy sounds and they couldn’t move a finger.  Their car ditched.  In a while they came out of it and they came back—­fast!  They’d just got back when we got short wave orders for everybody to get out.  If you look for that girl, be careful.  If she’s still there, you get her out quick!” Then he said sharply, “Here’s a chance for us to get going.  Move out of the way!”

There was a gap in the now diminishing spate of cars.  The driver of the stopped car drove furiously onto the highway.  He shifted gears and accelerated at the top of his car’s power.  Another car behind him braked and barely avoided a crash while blowing its horn furiously.  Then the traffic went on.  But it was lessening now.  It was mostly private cars, owned by the workmen.

Suddenly there were no cars coming down the long straight stretch of road.  Lockley got back on the highway and resumed his rush toward the spot the others fled from.  He heard behind him the diminishing rumble and roar of the fugitive motors.  He jammed his own accelerator down to the floor and plunged on.