It was a nondescript building, before which children had been drawn up in rows. Male and female, no older than ten or eleven, they were dressed in simple orange coveralls, and were all barefoot. A woman stood before them. She had a short club in her hand. The children’s posture was erect, their heads held still, but Luca could see how their eyes flickered towards the club.

One child was called forward. She was a slim girl, perhaps a little younger than the rest. The woman spoke to her almost gently, but Luca could hear she was describing, clinically, some small crime to do with not completing laundry promptly. The girl was wide-eyed and trembling, and Luca, astonished, saw urine trickle down her leg.

Then, without warning, the woman drew her club and slammed it against the side of the child’s head. The child fell in the dust and lay still. Luca would have stepped forward, but Dolo had anticipated his reaction and grabbed his arm. Immediately the woman switched her attention to the others. She stepped over the prone form and walked up and down their rows, staring into their faces; she seemed to be smelling their fear.

Luca had to look away. He glanced up. The Galaxy’s centre glowed beyond a milky blue sky.

Dolo murmured, ‘Oh, don’t worry. They know how to do such things properly here. The child is not badly hurt. Of course the other children don’t know that. The girl’s crime was trivial, her punishment meaningless - save as an example to the others. They are being exposed to violence; they have to get used to it, not to fear it. They must be trained not to question the authority over them. And—ah, yes.’

The woman had pulled a boy out of the ranks of silent children. Luca thought she could see tears glistening in his round eyes. Again the woman’s club flashed; again the child fell to the ground.

Luca asked, aghast, ‘And what was his crime?’

‘He showed feelings for the other, the girl. That too must be programmed out. What use would such emotions be under a sky full of Xeelee nightfighters?’ Dolo studied him. ‘Luca, I know it is hard. But it is the way of the Doctrines. One day such training may save that boy’s life.’

They walked on, as the children were made to pick up their fallen comrades.

They came to a more ragged group of children. Some of these were older, Luca saw, perhaps twelve or thirteen. It disturbed him to think that there might actually be combat veterans among this group of barefoot kids. At the centre of the group, two younger children - ten-year-olds - were fighting. The others watched silently, but their eyes were alive.