I was seething, had to move, so I eased up on the physical crowding I'd been doing, let him loose, and began to move out towards the nurses' station. He was following behind me.

I said, 'Listen – you listening? – I'm going for a piss. You come in behind me and I'll kick you in the balls. That facing my anger? That real enough?'

But these guys, you're talking to a granite wall. He looked like he was going to extend his arms, maybe embrace me, and that would have been such a mistake.

He tried, 'Jack, Jack, I'm reaching out to you. Do you really want to keep making the same tragic choices?'

Turning to go into the toilet, I asked, 'You familiar with Dudley Moore?'

He sensed a trap, ventured, 'Erm, yes.'

I looked round as if I was going to take him into my confidence, said, 'Dudley Moore was interviewing his great friend Peter Cook, asked him if he'd learned from his mistakes, and Cook replied, "Yes, absolutely, I can repeat them almost perfectly."'

In the bathroom, a man trailing an IV was trying to have a pee. He looked at me and said, 'What a way for a grown man to end up.'

I had no argument there.

That encounter with the zealot was replaying in my mind as I strolled along Shop Street. When I'd left my flat I'd been in a reasonable state of mind, but this flashback was bringing me down and fast.

Summer was definitely over. That peculiar light, unique to the West of Ireland, was flooding the street – it's a blend of brightness but always with that threat of rain, and it glistens like wet crystal even as it soothes you. The edge of darkness is creeping along the horizon and you get the feeling you'd better grab it while it lasts.

Outside Eason's Bookshop, a group of Christians were singing a rock version of 'One Day At A Time'. They had the well-scrubbed faces of clean-living young people. A girl in her late teens detached herself from the group when she noticed my interest, pushed a batch of leaflets at me and said, 'Jesus loves you.'