Later he could not recall the details of this dream, but that rush of piercing joy he did not forget. He had never known anything like it; so certain was its assurance of permanence, like one glimpse of a light that shines steadily, that he never thought of it as unreal though it had been experienced in dream. Only, however reliable there, he could not reattain it either by longing for it or by the act of will. He could only remember it, waking. When he dreamed of the wall again, as he sometimes did, the dreams were sullen and without resolution.

• • •

They had picked up the idea of “prisons” from episodes in the Life of Odo, which all of them who had elected to work on History were reading. There were many obscurities in the book, and Wide Plains had nobody who knew enough history to explain them; but by the time they got to Odo’s years in the Fort in Drio, the concept “prison” had become self-explanatory. And when a circuit history teacher came through the town he expounded the subject, with the reluctance of a decent adult forced to explain an obscenity to children. Yes, he said, a prison was a place where a State put people who disobeyed its Laws. But why didn’t they just leave the place? They couldn’t leave, the doors were locked. Locked? Like the doors on a moving truck, so you don’t fall out, stupid! But what did they do inside one room all the time? Nothing. There was nothing to do. You’ve seen pictures of Odo in the prison cell in Drio, haven’t you? Image of defiant patience, bowed grey head, clenched hands, motionless in encroaching shadows. Sometimes prisoners were sentenced to work. Sentenced? Well, that means a judge, a person given power by the Law, ordered them to do some kind of physical labor. Ordered them? What if they didn’t want to do it? Well, they were forced to do it; if they didn’t work, they were beaten. A thrill of tension went through the children listening, eleven- and twelve-year-olds, none of whom had ever been struck, or seen any person struck, except in immediate personal anger.

Tirin asked the question that was in all their minds: “You mean, a lot of people would beat up one person?”

“Yes.”

“Why didn’t the others stop them?”

“The guards had weapons. The prisoners did not,” the teacher said. He spoke with the violence of one forced to say the detestable, and embarrassed by it.

The simple lure of perversity brought Tirin, Shevek, and three other boys together. Girls were eliminated from their company, they could not have said why. Tirin had found an ideal prison, under the west wing of the learning center. It was a space just big enough to hold one person sitting or lying down, formed by three concrete foundation walls and the underside of the floor above; the foundations being part of a concrete form, the floor of it was continuous with the walls, and a heavy slab of foamstone siding would close it off completely. But the door had to be locked. Experimenting, they found that two props wedged between a facing wall and the slab shut it with awesome finality. Nobody inside could get that door open.