The opening was twenty-five feet away.

"When I saw `now,' go into neutral steer and turn onehundred-eighty degreesчfast. They can't be expecting that. Theydon't have it themselves. Then open up with the fifty-calibers andfire your rockets at the Caddy, turn at a right angle and start backthe way we came, and spray the naphtha as we go, and fire on the sixguards...

"Now!" he cried, leaping up in his seat.

He was slammed back as they spun, and he heard the clattering ofher guns before his head cleared. By then, flames were leaping up inthe distance.

Jenny's guns were extruded now and turning on their mounts,spraying the line of vehicles with hundreds of leaden hammers. Sheshook, twice, as she discharged two rockets from beneath her partlyopened hood. Then they were moving forward, and eight or nine of thecars were rushing downhill toward them.

She turned again in neutral steer and sprang back in the directionfrom which they had come, around the southeast corner of the pile.Her guns were hammering at the now retreating guards, and in the wideread view mirror Murdock could see that a wall of flame was toweringhigh behind them.

"You missed it!" he cried. "You missed the black Caddy! Yourockets hit the cars in front of it and it backed off!"

"I know! I'm sorry!"

"You had a clear shot!"

"I know! I missed!"

They rounded the pile just as two of the guard cars vanished intothe tunnel. Three more lay in smoking ruin. The sixth had evidentlypreceded the other two out through the passage.

"Here it comes now!" cried Murdock. "Around the other end of thepile! Kill it! Kill it!"

The ancient guardian of the graveyardчit looked like a Ford, buthe couldn't be sureчmoved forward with a dreadful chattering sound andinterposed itself in the line of fire.

"My range is blocked."

"Smash that junkheap and cover the tunnel! Don't let the Caddy