That evening I sat opposite my husband at dinner and pretended everything was ordinary.
Forty years of marriage.
And I was sitting in a dining room with a man I have slept next to for about fourteen thousand nights, working out how much of my own life I actually had the facts on.
I went through it four years at a time. The year the roof went. The year his father died. The two years he was doing the contract up north.
Looking for the gap. Looking for the four days I could not account for.
There is no gap. That is what I could not get round even then. Everything in forty years adds up, because none of it was ever hidden in time; it was hidden in a building.
A waiter put my plate down and walked away without a word.
I did not look at him. I could not now tell you one thing about his face from that moment, which I think about, because he had decided something enormous about four seconds earlier.
And a few seconds later I saw a corner of paper under the rim of it.
I waited until Hollis looked down at the wine list, and I pulled it out and put it in my lap.
I know what your husband is doing here. Eleven o’clock. Back entrance. Come on your own.
Four lines, in pencil, on a corner torn off something.
I put it in my cardigan sleeve and I ate a dinner and I talked about the weather for about forty minutes.
At eleven I went down.
He was outside by the bins with a jacket on over his uniform, in the cold, having clearly waited about eleven minutes.
About forty. Grey at the sides. A wedding ring.
He looked frightened, which I did not understand at the time and which I understand completely now: he had worked out about half of something and had decided to act on it, and he was about four seconds from finding out he was wrong.
He said: you didn’t hear this from me.
And then: I’ve seen your husband here several times.
He was about to do a kind thing extremely badly and he knew it, and he did it anyway, and I have decided that he is not the villain of this and neither is anybody else except me.
I said: with another woman?
He hesitated. And he said: a young woman.
And everything fitted at once, the way it does, in about four seconds.
The trips he goes on for work that I have never once queried. The same hotel, every time. The same room, asked for by name.
A receptionist who had been asked, personally, by my husband, not to talk to me.
It is a complete theory. It accounts for every single thing I had seen in two days and it is entirely wrong, and I believed it all the way down to the bottom.
I said: how long?
And the waiter frowned at me. He actually frowned.
He said: you think they were having an affair?
I said: weren’t they?
He said: no.
And then, slowly, because he could see that I had not taken it in: Mr Thorne books the room in his own name. He pays for it on his own card at the desk.
And then: but your husband never goes upstairs.
I said: then why is he paying for her room?
And behind me, in the dark, about four feet away, my husband said:
Do you actually want to know?
He had followed me down the stairs. Not the lift. He had been standing there for most of it. He had let that waiter get all the way to the one honest sentence before he said anything at all.