The question is wrong, that's the trouble. It assumes that actions are determined by volition, deliberate thought, a careful weighing-up of facts, all that puppet-show twitching which passes for consciousness. I was living like that because I was living like that, there is no other answer. When I look back, no matter how hard I try I can see no clear break between one phase and another. It is a seamless flow – although flow is too strong a word. More a sort of busy stasis, a sort of running on the spot. Even that was too fast for me, however, I was always a little way behind, trotting in the rear of my own life. In Dublin I was still the boy growing up at Coolgrange, in America I was the callow young man of Dublin days, on the islands I became a kind of American. And nothing was enough. Everything was coming, was on the way, was about to be. Stuck in the past, I was always peering beyond the present towards a limitless future. Now, I suppose, the future may be said to have arrived.

None of this means anything. Anything of significance, that is. I am just amusing myself, musing, losing myself in a welter of words. For words in here are a form of luxury, of sensuousness, they are all we have been allowed to keep of the rich, wasteful world from which we are shut away.

O God, O Christ, release me from this place.

O Someone.

I must stop, I am getting one of my headaches. They come with increasing frequency. Don't worry, your lordship, no need to summon the tipstaff or the sergeant-at-arms or whatever he's called – they are just headaches. I shall not suddenly go berserk, clutching my temples and bawling for my – but speak of the devil, here she is, Ma Jarrett herself. Come, step into the witness box, mother.

It was early afternoon when I reached Coolgrange. I got down at the cross and watched the bus lumber away, its fat back-end looking somehow derisive. The noise of the engine faded, and the throbbing silence of summer settled again on the fields. The sky was still overcast, but the sun was asserting itself somewhere, and the light that had been dull and flat was now a tender, pearl-grey glow. I stood and looked about me. What a surprise the familiar always is. It was all there, the broken gate, the drive, the long meadow, the oak wood – home! – all perfectly in place, waiting for me, a little smaller than I remembered, like a scale-model of itself. I laughed. It was not really a laugh, more an exclamation of startlement and recognition. Before such scenes as this – trees, the shimmering fields, that mild soft light – I always feel like a traveller on the point of departure. Even arriving I seemed to be turning away, with a lingering glance at the lost land. I set off up the drive with my raincoat over my shoulder and my battered bag in my hand, a walking cliché, though it's true I was a bit long in the tooth, and a bit on the beefy side, for the part of the prodigal son. A dog slid out of the hedge at me with a guttural snarl, teeth bared to the gums.

I halted. I do not like dogs. This was a black-and-white thing with shifty eyes, it moved back and forth in a half-circle in front of me, still growling, keeping its belly close to the ground. I held the suitcase against my knees for a shield, and spoke sharply, as to an unruly child, but my voice came out a broken falsetto, and for a moment there was a sense of general merriment, as if there were faces hidden among the leaves, laughing. Then a whistle sounded, and the brute whined and turned guiltily toward the house. My mother was standing on the front steps. She laughed. Suddenly the sun came out, with a kind of soundless report. Good God, she said, it is you, I thought I was seeing things.

I hesitate. It is not that I am lost for words, but the opposite. There is so much to be said I do not know where to begin. I feel myself staggering backwards slowly, clutching in my outstretched arms a huge, unwieldy and yet weightless burden. She is so much, and, at the same time, nothing. I must go carefully, this is perilous ground. Of course, I know that whatever I say will be smirked at knowingly by the amateur psychologists packing the court. When it comes to the subject of mothers, simplicity is not permitted. All the same, I shall try to be honest and clear. Her name is Dorothy, though everyone has always called her Dolly, I do not know why, for there is nothing doll-like about her. She is a large, vigorous woman with the broad face and heavy hair of a tinker's wife. In describing her thus I do not mean to be disrespectful. She is impressive, in her way, at once majestic and slovenly. I recall her from my childhood as a constant but remote presence, statuesque, blank-eyed, impossibly handsome in an Ancient Roman sort of way, like a marble figure at the far side of a lawn. Later on, though, she grew to be top-heavy, with a big backside and slim legs, a contrast which, when I was an adolescent and morbidly interested in such things, led me to speculate on the complicated architecture that must be necessary to bridge the gap under her skirt between those shapely knees and that thick waist. Hello, mother, I said, and looked away from her, casting about me crossly for something neutral on which to concentrate. I was annoyed already. She has that effect on me, I have only to stand before her and instantly the irritation and resentment begin to seethe in my breast. I was surprised. I had thought that after ten years there would be at least a moment of grace between our meeting and the first attack of filial heartburn, but not a bit of it, here I was, jaw clenched, glaring venomously at a tuft of weed sprouting from a crack in the stone steps where she stood. She was not much changed. Her bosom, which cries out to be called ample, had descended to just above her midriff. Also she had grown a little moustache. She wore baggy corduroy trousers and a cardigan with sagging pockets. She came down the steps to me and laughed again. You have put on weight, Freddie, she said, you've got fat. Then she reached out and – this is true, I swear it – and took hold of a piece of my stomach and rolled it playfully between a finger and thumb. This woman, this woman – what can I say? I was thirty-eight, a man of parts, with a wife and a son and an impressive Mediterranean tan, I carried myself with gravitas and a certain faint air of menace, and she, what did she do? – she pinched my belly and laughed her phlegmy laugh. Is it any wonder I have ended up in jail? Is it? The dog, seeing that I was to be accepted, sidled up to me and tried to lick my hand, which gave me an opportunity to deliver it a good hard kick in the ribs. That made me feel better, but not much, and not for long.

Is there anything as powerfully, as piercingly evocative, as the smell of the house in which one's childhood was spent? I try to avoid generalisations, as no doubt the court has noticed, but surely this is a universal, this involuntary spasm of recognition which comes with the first whiff of that humble, drab, brownish smell, which is hardly a smell at all, more an emanation, a sort of sigh exhaled by the thousands of known but unacknowledged tiny things that collectively constitute what is called home. I stepped into the hall and for an instant it was as if I had stepped soundlessly through the membrane of time itself. I faltered, tottering inwardly. Hatstand with broken umbrella, that floor tile, still loose. Get out, Patch, damn you! my mother said behind me, and the dog yelped. The taste of apples unaccountably flooded my mouth. I felt vaguely as if something momentous had happened, as if in the blink of an eye everything around me had been whipped away and replaced instantly with an exact replica, perfect in every detail, down to the last dust-mote. I walked on, into this substitute world, tactfully keeping a blank expression, and seemed to hear a disembodied held breath being let go in relief that the difficult trick had worked yet again.