“How come I can’t see the track underneath us, Blaine?”

“THE IMAGES YOU SEE ARE COMPUTER-GENERATED,” Blaine replied. “THE COMPUTER ERASES THE TRACK FROM THE LOWER-QUADRANT IMAGE IN ORDER TO PRESENT A MORE PLEASING VIEW, AND ALSO TO REINFORCE THE ILLUSION THAT THE PASSENGERS ARE FLYING.”

“It’s incredible,” Susannah murmured. Her initial fear had passed and she was looking around eagerly. “It’s like being on a flying carpet. I keep expecting the wind to blow back my hair—”

“I CAN PROVIDE THAT SENSATION, IF YOU LIKE,” Blaine said. “ALSO A LITTLE MOISTURE, WHICH WILL MATCH CURRENT OUTSIDE CONDITIONS. IT MIGHT NECESSITATE A CHANGE OF CLOTHES, HOWEVER.”

“That’s all right, Blaine. There’s such a thing as taking an illusion too far.”

The track slipped through a tall cluster of buildings which reminded Jake a little of the Wall Street area in New York. When they cleared these, the track dipped to pass under what looked like an elevated road. That was when they saw the purple cloud, and the crowd of people fleeing before it.

6

“BLAINE, WHAT’S THAT?” JAKE asked, but he already knew.

Blaine laughed... but made no other reply.

The purple vapor drifted from gratings in the sidewalk and the smashed windows of deserted buildings, but most of it seemed to be coming from manholes like the one Gasher had used to get into the tunnels below the streets. Their iron covers had been blown clear by the explosion they had felt as they were boarding the mono. They watched in silent horror as the bruise-colored gas crept down the avenues and spread into the debris-littered side-streets. It drove those inhabitants of Lud still interested in survival before it like cattle. Most were Pubes, judging from their scarves, but Jake could see a few splashes of bright yellow, as well. Old animosities had been forgotten now that the end was finally upon them.

The purple cloud began to catch up with the stragglers—mostly old people who were unable to run. They fell down, clawing at their throats and screaming soundlessly, the instant the gas touched them. Jake saw an agonized face staring up at him in disbelief as they passed over, saw the eyesockets suddenly fill up with blood, and closed his eyes.

Ahead, the monorail track disappeared into the oncoming purple fog. Eddie winced and held his breath as they plunged in, but of course it parted around them, and no whiff of the death engulfing the city came to them. Looking into the streets below was like looking through a stained-glass window into hell.

Susannah put her face against his chest.

“Make the walls come back, Blaine,” Eddie said. “We don’t want to see that.”

Blaine made no reply, and the transparency around and below them remained. The cloud was already disintegrating into ragged purple streamers. Beyond it, the buildings of the city grew smaller and closer together. The streets of this section were tangled alleyways, seemingly without order or coherence. In some places, whole blocks appeared to have burned flat... and a long time ago, for the plains were reclaiming these areas, burying the rubble in the grasses which would some day swallow all of Lud. The way the jungle swallowed the great civilizations of the Incas and Mayas, Eddie thought. The wheel of ka turns and the world moves on.