I thought that I had forgotten, in a way. The real mystery that I was engaged in tended to crowd the fiction out.

'What are you betting on in our race? ' he asked. 'I suppose Premiere will win. What do you think?'

' Upper Gumtree,' I said.

'It's supposed to be half asleep,' he objected.

'It's got a nice face,' I said.

He looked at me sideways. 'You're crazy, you know that?'

'I am but mad north-north-west.'

'When the wind is southerly,' he said promptly, 'I know a hawk from a handsaw.' He laughed. There isn't an actor born who doesn't hope to play Hamlet.'

'Have you ever?'

'Only in school. But once learned, never forgotten. Shall I give you my "To be or not to be"?'

'No.'

'You slay me. See you tonight.'

He went off with a medium spring to his step and I saw him later with his arms round Donna's shoulders, which wasn't (as far as I knew) in his script.

Most of the owners came down from the Clubhouse to watch the saddling of the runners in the Jockey Club Race Train Stakes, and all the sportier of them wore the rosettes.Filmer didn't: there was no lightheartedness in him. Daffodil however had fastened hers to her cleavage, the red, white and gold popping out now and again past the long-haired chinchillas. Mrs Young wore hers boldly on her lapel. Mr Young's wasn't in sight.

The Unwins, resetted, were showing uninhibited pleasure in Upper Gumtree, who did in fact have a nice face, and wasn't unacceptably sleepy. Upper Gumtree's trainer hadn't made the journey from Australia, and nor had his usual jockey: Canadian substitutes had been found. The Unwins beamed and patted everyone within reach including the horse, and Mr Unwin in his great antipodean accent could be heard calling his jockey 'son', even though the rider looked older by far than the owner.

In the next stall along things were a great deal quieter. Mercer Lorrimore, unattended by the rest of his family, talked pleasantly with his trainer, who had come from Toronto, and shook hands with his jockey, the same one who had ridden for him at Woodbine. Premiere, the favourite, behaved like a horse that had had a fuss made of him all him life; almost, I thought fancifully, as arrogantly as Sheridan.

The owners of Flokati were showing Mavis and Walter Bricknell-type behaviour, fluttering about in a nervous anxiety that would be bound to effect the horse if it went on too long. Their ineffective-looking trainer was trying to stop the owners from straightening the number cloth, tidying the forelock over the headband, tweaking at the saddle and shoving their big rosettes with every ill-judged movement near the horse's affronted nostrils. A riot, really. Poor Mr and Mrs Flokati; owning the horse looked an agony, not a joy.

Mr and Mrs Young, like Mercer Lorrimore, had shipped their Winnipeg runners, two of them, by road. They, old hands at the owning game, stood by with calm interest while their pair, Soluble and Slipperclub, were readied, Mrs Young speaking with her sweet expression to one to the jockeys, Mr Young more impassively to the other.

Daffodil Quentin's runner, Pampering, had been flown in with five others owned by people on the train, all of whom were strolling around with rosettes and almost permanently smiling faces. This was, after all, one of the highlights of their journey, the purpose behind the pizzazz. I learned that the Manitoba Racing Commission had moreover by midafternoon given each of them not only a champagne reception and a splendid lunch but also, as a memento, a framed group photograph of all the owners on the trip. They were living their memories, I thought, here and now.

Television cameras all over the place recorded everything both for news items that evening and for the two-hour Support Canadian Racing programme which posters everywhere announced was being made for a gala showing coast to coast after the triple had been completed in Vancouver.

The Winnipeg runners went out on to the track to bugle fanfares and cheers from the stands and were pony-escorted to the starting gate.

Mercer Lorrimore's colours, red and white like the resetted he had pinned on gamely For the Sake of Canadian Racing, could be seen entering the outermost stall. Daffodil's pale blue and dark green were innermost. Upper Gumtree, carrying orange and black, started dead centre of the eleven runners and came out of the stalls heading a formation like an arrow.

I was watching from high up, from the upper part of the grandstand, above the Clubhouse floor to which the owners had returned in a chattering flock to watch the race. Through my binoculars-camera the colours down on the track in the chilly sunshine looked sharp and bright, the race easy on that account to read.

The arrow formation soon broke up into a ragged line, with Premiere on the outside, Pampering on the inner and Upper Gumtree still just in front. The Youngs' pair, split by the draw, nevertheless came together and raced the whole way side by side like twins. Flokati, in pink, made for the rails as if needing them to steer by, and four of the other runners boxed him in.

Going past the stands for the first time, the Unwins’ Upper Gumtree still showed in front but with Premiere almost alongside; Pampering was on the inside tugging his jockey's arms out. Doing their best for the glory of Canada, the whole field of eleven swept round the bend and went down the far side as if welded together, and it still seemed when they turned for home that that was how they might finish, in a knot.

They split apart in the straight, one group swinging wide, the red and white of Premiere spurting forward with the Youngs' pair at his quarters and Upper Gumtree swerving dramatically through a gap to take the rails well ahead of Pampering.

The crowd bounced up and down. The money was on Premiere. The yelling could have been heard in Montreal. The Canadian racing authorities were again getting a rip-roaring brilliant finish to a Race Train Stakes… and Mercer, putting his brave face on it, again came in second.

It was the Unwins, in the stratosphere of ecstasy, who led Upper Gumtree into the winners' circle. The Unwins from Australia who were hugging and kissing everyone near enough (including the horse). The Unwins who had their photographs taken each side of their panting winner, now covered across the shoulders by a long, triumphant blanket of flowers. The Unwins who received the trophy, the cheque and the speeches from the President of the racecourse and the top brass of the Jockey Club; whose memories of the day would be the sweetest.

Feeling pleased for them, I lowered the binoculars through which I'd been able to see even the tears on Mrs Unwin's cheeks, and there below me and in front of the grandstand was the man with the gaunt face looking up towards the Clubhouse windows.

Almost trembling with haste, I put the binoculars up again, found him, activated the automatic focus, pressed the button, heard the quiet click of the shutter: had him in the bag.

It had been my only chance. Even before the film had wound on, he'd looked down and away, so that I could see only his forehead and his grey hair; and within two seconds, he'd walked towards the grandstand and out of my line of vision.

I had no idea how long he'd been standing there. I'd been too diverted by the Unwins' rejoicings. I went down from the upper grandstand as fast as I could, which was far too slowly because everyone else was doing the same thing.

Down on ground level again, I couldn't see gaunt-face anywhere. The whole crowd was on the move: one could get no length of view. The Race Train event had been the climax of the programme and although there was one more race on the card, no one seemed to be much interested. A great many red and white rosettes, baseball caps, T-shirts and balloons were on their way out of the gates.