cards.... In any event he had to sleep in the tube that night and he definitely wanted to dream the dreams on the cards he had just gotten from the man on the corner.

He dropped the cards into the slot at the top of the panel, climbed into the tube and pressed a button. The top closed over him, like a hand. He lay still, feeling the warm clasp wash over his body. There was darkness and silence and a cool motion of antiseptic air. He could try the first dream. If it wasn't right, he could shut it off and sleep without dreams.

He pressed another button.

Silence.

The sound of his regular breathing.

Then a sighing came into his mind, and a green haze. The sighing became a soft breeze; the green, tree-covered hills rolling off to the horizon. He relaxed, aware in a fading, sinking part of his consciousness that the machine worked as usual. He would dream and wait and hope....

And so the wind was breathing across the land from off a vast stretch of blue water, which broke along a sandy beach in foamy white breakers. The surf thundered all through his body. The wind brushed against him like a great, purring cat. He looked up at the blue sky and seemed to feel himself rising and sinking, both at the same time, up into its depths. As his sight touched the sun there was an explosion of brightness which blinded him. He turned away then to the rolling green sea of hills, saw the trees bending from the surge of wind and heard the rustling of leaves.

And then a deep voice moved through his mind.

"Outside the city," it said, "all this exists. During the terrible burning of the Earth back in the wars of its antiquity, the city was built as a place of life for those who yet lived. But those people were not aware that the Earth would come alive again and they made the city so that no death could enter it from without and no life could escape from within. And they turned away from the Earth and lived only with the city so that it became their universe—to all but a very few of us. We still held a faint awareness of what the Earth had been—this passed down to us for many generations, in whisperings, by the wise ones of our people, back in the beginning of the city. And in those times, we had been in the city too long, for thousands of years. We knew that there must be freedom beyond the walls, if we could get through. But the walls were thick and high and without a flaw, making a sky over us. We worked for five hundred years on a machine to get us through the wall. Now a few of us have succeeded and more will follow us to the freedom out here in the good land. There is room for everyone here, there are no boundaries and no ceilings and no walls anywhere. And you may join us some time in the near future, if you wish."

Twenty-three sighed in his sleep.

Now a great city faded into his mind. There were long, tree lined streets and buildings, some built in rising spirals, some in spreading squares, others in ovals, domes and curved half circles. The wind wandered among the buildings and the bursts of green. People, dressed in white, flowing robes or black tights, walked the streets. He could hear their footsteps on the stone or grassy walk, could hear the hum of vehicles rolling along the streets or flying through the air. They were long and streamlined or short and round, or they were curved like gondolas or squat like saucers. And they were moving at many speeds. Yet there was order. And the air was sweet and clean. A black line of clouds was rising across the horizon. Soon there would be lightning and thunder and cool rain.

The deep voice touched him again. "This is the city that can be. A city of life, open to the sky and the earth, a city in which people can find and follow their own lives. After the wars, the cities were built to shut out the death of Earth. But the Earth has come to life again. And so can the cities."

The silence came while the picture changed and Twenty-three stirred, waiting.

A figure grew in his mind, wavered, and became a