Apparently dogs had been disappearing from the town for a couple of weeks before some children saw my brother pouring a can of petrol over a little Yorkshire terrier and setting fire to it. Their parents believed them and went looking for Eric, to find him doing the same thing with an old mongrel he had tempted with aniseed balls sweeties, and caught. They chased him through the woods behind the town but lost him.

Diggs came to the island again that evening to tell us he had come to arrest Eric for disturbing the peace. He waited until quite late, only accepting a couple of the whiskies my father offered him, but Eric did not return. Diggs left, and my father waited up, but still Eric didn't show. It was three days and five dogs later before he came back, haggard and unwashed and smelling of petrol and smoke, his clothes all torn and his face lean and filthy. My father heard him come in early in the morning, raid the fridge, gulp down several meals at once, and stamp upstairs to bed.

My father crept down to the phone and called Diggs, who arrived before breakfast. Eric must have heard or seen something, though, because he went out through his room window and down the drainpipe to the ground, and made off with Diggs's bike. It was another week and two more dogs before he was finally caught, siphoning petrol from somebody's car in the street. They broke his jaw in the process of making their citizen's arrest, and this time Eric didn't get away.

A few months later he was certified insane. He had had all sorts of tests, tried to escape countless times, assaulted male nurses and social workers and doctors, and threatened all of them with legal action and assassination. He was moved to gradually more and more long-term and secure institutions as his tests and threats and struggles continued. My father and I heard that he quieted down a lot once he settled into the hospital to the south of Glasgow and no longer made his escape attempts, but looking back he was probably just trying — successfully, it would seem — to lull his keepers into a false sense of security.

And now he was making his way back to see us.

I swept my binoculars slowly across the land in front and beneath me, from north to south, from haze to haze, across the town and the roads and the railway and the fields and the sands, and I wondered if under my gaze at any point came the place where Eric was now, if he had got this far already. I felt he was close. I didn't have any good reason, but he had had the time, the call of last night sounded clearer than the others he had made, and… I just felt it. He might be here now, lying up waiting for night before he moved, or skulking through the woods or through the whin bushes or within the hollows of the dunes, heading for the house or looking for dogs.

I walked along the ridge of hills, then came down a few miles south of the town, down through the ranks of conifers where distant buzz-saws sounded and the dark masses of the trees were shady and quiet. I went across the railway line and over a few fields of swaying barley, across the road and over the rough sheep-pasture to the sands.

My feet were sore and my legs ached slightly as I walked along the line of hard sand on the beach. A slight wind had come up off the sea, and I was glad of it, because the clouds had all gone and the sun, though sinking gradually, was still powerful. I came to a river I had already crossed once in the hills, and crossed it again near the sea, going up into the dunes a way to where I knew there was a wire bridge. Sheep scattered in front of me, some shorn, some still shaggy, bouncing away with their fractured-sounding baas, then stopping once they thought they were safe and dipping their heads or kneeling to resume cropping the flower-scattered grass.

I remember I used to despise sheep for being so profoundly stupid. I'd seen them eat and eat and eat, I'd watched dogs outsmart whole flocks of them, I'd chased them and laughed at the way they ran, watched them get themselves into all sorts of stupid, tangled situations, and I'd thought they quite deserved to end up as mutton, and that being used as wool-making machines was too good for them. It was years, and a long slow process, before I eventually realised just what sheep really represented: not their own stupidity, but our power, our avarice and egotism.

After I'd come to understand evolution and know a little about history and farming, I saw that the thick white animals I laughed at for following each other around and getting caught in bushes were the product of generations of farmers as much as generations of sheep; we made them, we moulded them from the wild, smart survivors that were their ancestors so that they would become docile, frightened, stupid, tasty woolproducers. We didn't want them to be smart, and to some extent their aggression and their intelligence went together. Of course, the rams are brighter, but even they are demeaned by the idiotic females they have to associate with and inseminate.

The same principle applies to chickens and cows and almost anything we've been able to get our greedy, hungry hands on for long enough. It occasionally occurs to me that something the same might have happened to women but, attractive though the theory might be, I suspect I'm wrong.

Home in time for dinner, I wolfed down my eggs, steak, chips and beans, and spent the rest of the evening watching television and picking bits of dead cow out of my mouth with a match.

IT ALWAYS annoyed me that Eric went crazy. Although it wasn't an on-off thing, sane one minute, mad the next, I don't think there is much doubt that the incident with the smiling child triggered something in Eric that led, almost inevitably, to his fall. Something in him could not accept what had happened, could not fit in what he had seen with the way he thought things ought to be. Maybe some deep part of him, buried under layers of time and growth like the Roman remains of a modem city, still believed in God, and could not suffer the realisation that, if such an unlikely being did exist, it could suffer that to happen to any of the creatures it had supposedly fashioned in its own image.

Whatever it was that disintegrated in Eric then, it was a weakness, a fundamental flaw that a real man should not have had. Women, I know from watching hundreds — maybe thousands — of films and television programmes, cannot withstand really major things happening to them; they get raped, or their loved one dies, and they go to pieces, go crazy and commit suicide, or just pine away until they die. Of course, I realise that not all of them will react that way, but obviously it's the rule, and the ones who don't obey it are in the minority.

There must be a few strong women, women with more man in their character than most, and I suspect that Eric was the victim of a self with just a little too much of the woman in it. That sensitivity, that desire not to hurt people, that delicate, mindful brilliance — these things were his partly because he thought too much like a woman. Up until his nasty experience it never really bothered him, but just at that moment, in that extremity of circumstance, it was enough to break him.

I blame my father, not to mention whatever stupid bitch it was threw him over for another man. My father must take the blame in part at least because of that nonsense in Eric's early years, letting him dress as he wanted and giving him the choice of dresses and trousers; Harmsworth and Morag Stove were quite right to be worried about the way their nephew was being brought up, and did the proper thing in offering to look after him. Everything might have been different if my father hadn't had those daft ideas, if my mother hadn't resented Eric, if the Stoves had taken him away earlier; but it happened the way it did, and as such I hope my father blames himself as much as I blame him. I want him to feel the weight of that guilt upon him all the time, and have sleepless nights because of it, and bad dreams that wake him up in a sweat on cool nights once he does get to sleep. He deserves it.