“I’m a bit of flower nut and I thought I could spend some time there until Sir Harry comes back. I’ve heard wonders about his garden.”

“You wish to wait for Sir Harry in his garden?”

“If it doesn’t put anyone out.”

“No … I, uh, I don’t expect that it would.”

She looked at me and nodded curtly. “Follow me,” she said.

We went through a spotless kitchen, all gleaming surfaces and pots on hooks. The appliances had all been brand new in about 1975. Sir Harry didn’t seem like the sort of man who would let his cars rot but get expensive kitchen gear. It must be a feminine influence. His wife had bought that kit, a wife who was, now, where exactly?

I walked through the back door and out into the kitchen garden.

“Here you go,” she said.

I pretended to be fascinated by an ugly yellow smudge of daffodils – the only thing at all growing back here.

Of course I had already seen the greenhouse through the kitchen window.

Mrs Patton said “I’ll leave you to it,” and disappeared back inside. I lit a cigarette. I knew that she’d be spying on me but there was a hedge blocking the rear entrance to the greenhouse from the back windows of the residence. I finished my smoke, inspected more of the flowers and walked behind the hedge. I waited a moment for a cry or footsteps hurrying towards me but I heard nothing. I turned a rusted iron handle and went inside the greenhouse. I didn’t know what I was expecting to find but I was not counting on a completely empty space. No plants, no pots, nothing. I wrote “a clean concrete floor, a few gardening tools”, in my notebook. The gardening tools were one rake and one hoe.

I had got what I came for on this trip.

I wrote “Down at heel scion. Hiding something or just an arse? No rosary pea or anything else in the greenhouse” in my notebook and walked into the house again.

Mrs Patton intercepted me in the gloomy hall.

“Inspector Duffy, is anything amiss?” she asked.

“No, nothing’s amiss, Mrs Patton. However, I’ve just remembered that I have to be somewhere else. I was so taken with your daffodils that I completely forgot. You’ll have to excuse me, ma’am. Thank you for your hospitality.”

“Oh … oh, what shall I tell Sir Harry?”

“No message, thank you,” I said.

I walked briskly out of the hall and onto the crunchy gravel drive. I gave the Bentley and the Roller a sympathetic look and I juked under the palm trees.

Thunder rumbled in a grey skin and it began to rain with big heavy, sporadic drops. At the hill’s summit I surveyed the broad wet valley filled with cows and sheep and fields too boggy to accommodate man or beast.

The prospect to the north was of Larne Lough and Magheramorne on the far shore.

The widow McAlpine’s farm was a good mile off on the far side of a hill. You wouldn’t be able to see it even from the third floor of this house. No one inside could possibly have witnessed Martin’s murder. There would be no teenage maids too frightened to testify but who could be broken by the age-old tactics of question after question after question.

I dandered down the hill and in twenty minutes I was back at the farm.

I went round the back of the house and tried the rear door.

It too was locked. Cora was barking herself hoarse now. A side window was open, but it was too small for me to squeeze through. I lit my last ciggy, climbed a style over the stone wall and strode out across the fields in the direction of the tied-up horse.

The pasture was little better than a bog with some tuft grass and sodden heather, and in a few moments my DMs were soaked through. Sheep pellets were everywhere and in a slurry pond there was the carcass of an old ewe, suspended just beneath the surface.

The horse was an old white mare who barely registered my presence as I approached. I stroked her head, but I had no sugar to offer her. I grabbed some moist dandelion leaves and held them under her nose but she turned her head away disdainfully. “Spoiled rotten, so you are,” I said, and gave her a pat on the neck.

I was curious about the shed so I knocked on the door, but there was no answer. I opened it and saw a lantern hanging from the ceiling and a ladder leading underground.

“What’s all this?” I muttered, but the mare kept her thoughts to herself.

I looked down into the hole. It was a vertical tunnel lit by a series of incandescent bulbs. The walls were white, chalky and crumbly and I wasn’t encouraged that the rickety metal ladder was bolted to them. There was a slightly unpleasant, sulphurous smell which also boded ill.

I hesitated at the top of the ladder for a moment and then decided to climb down. Twenty rungs to the bottom. A narrow passage lead to a door which said: No Entry Except By Authorised Personnel.

I pushed on the door and entered the chamber. It was like a cave really and everything a cave should be: big, cathedral-like, sonorous, intimidating and impressive.

Two bright arc lamps lit the white, chalky and oddly beautiful walls and cast shadows deep into the back recess of the cavern. To one side there were several metal cupboards and in the middle of the room Emma McAlpine was sitting on a sofa next to a generator which didn’t appear to be running. (How the lights were working was the first of the several mysteries.)

She must have heard me coming down the ladder but she did not look up.

“What are you reading?” I asked. “It’s not the Bible, is it?”

“Inspector Duffy,” she said, and set the book on her lap. It had yellow binding; not many Bibles had yellow covers, not even The Good News.

She was dressed in jeans, an Aran sweater and a wax jacket. Riding boots, of course, but she had kicked those off. Her hair was tied back in a pony tail. Under the fluorescent lights she looked wan, sickly, not a million miles removed from Elizabeth Siddal in Ophelia.

I walked towards her. “I get the feeling that you were expecting me,” I said.

“Why would I be?”

“Because you heard the news.”

She nodded. “Inspector Dougherty. I’m sorry,” she said.

“Sorry for what?”

“Dougherty was a brother officer, wasn’t he?”

“Yes.”

“Would you like some tea? I brought a flask. It’s already made up with milk and sugar. Scandalous, I know.”

“Sure.”

“Have a seat.”

I sat next to her on the leather sofa. She smelled of horse and sweat and leather. The sofa was covered in a layer of powdery white shit from the crumbling ceiling; I brushed myself a space with the back of my hand and sat down. She produced a flask with a paisley design on the side, unscrewed the plastic lid and poured a cup of tea into a white plastic mug.

“I also brought a flask of gin, if you want to slip that in there,” she said, as if that would be the most natural thing in the world.

“No, you’re all right, thanks.”

I took the tea, which was weak and very sweet. The way I liked it. The type of tea you were supposed to give to people to stop them going into shock.

“Dougherty came to see you, didn’t he?” I asked.

“Yes.”

“What about?”

“I think he may have been drunk. He had certainly been drinking.”

“What did he talk to you about?”

“In an extremely vulgar manner he demanded to know exactly where I had been when Martin got shot.”

“And what did you tell him?”

“I told him that I was in the kitchen.”

“And what did he say to that?”

“He said that he didn’t believe me. He said that I wasn’t telling him everything.”

“And what did you say to that?”

“I told him that no one could call me a liar in my own home and I asked him to leave.”

“And did he leave?”

“No. He did not. He abused me in the most disgraceful language. At one point I felt that he was going to strike me.”

“And then?”

“Well, then he did leave, but not before melodramatically promising that he would return.”