I HAD BEEN making the rounds of the Sacrifice Poles the day we heard my brother had escaped. I already knew something was going to happen; the Factory told me.

At the north end of the island, near the tumbled remains of the slip where the handle of the rusty winch still creaks in an easterly wind, I had two Poles on the far face of the last dune. One of the Poles held a rat head with two dragonflies, the other a seagull and two mice. I was just sticking one of the mouse heads back on when the birds went up into the evening air, kaw-calling and screaming, wheeling over the path through the dunes where it went near their nests. I made sure the head was secure, then clambered to the top of the dune to watch with my binoculars.

Diggs, the policeman from the town, was coming down the path on his bike, pedalling hard, his head down as the wheels sank part way into the sandy surface. He got off the bike at the bridge and left it propped against the suspension cables, then walked to the middle of the swaying bridge, where the gate is. I could see him press the button on the phone. He stood for a while, looking round about at the quiet dunes and the settling birds. He didn't see me, because I was too well hidden. Then my father must have answered the buzzer in the house, because Diggs stooped slightly and talked into the grille beside the button, and then pushed the gate open and walked over the bridge, on to the island and down the path towards the house. When he disappeared behind the dunes I sat for a while, scratching my crotch as the wind played with my hair and the birds returned to their nests.

I took my catapult from my belt, selected a half-inch steelie, sighted carefully, then sent the big ball-bearing arcing out over the river, the telephone poles and the little suspension bridge to the mainland.