It is a long way on foot from the stands to the far end of Maidenhead racecourse, and by the time I got there my shoes, socks, and trouser legs were wet through from the long sodden grass. It was very cold, very foggy. There was no one about.

I reached the fence, the harmless, softish, easy-to-jump fence, made of black birch twigs standing upright. Three feet thick at the bottom slanting to half that size at the top, four feet six inches tall, about ten yards wide. Ordinary, easy.

I looked carefully along the landing side of the fence. There was nothing unusual. Round I went to the takeoff side. Nothing. I poked around the wing which guides the horses into the fence, the one on the inside of the course, the side Bill had been when he fell. Still nothing.

It was down underneath the wing on the outside of the course that I found what I was looking for. There it lay in the long grass, half hidden, beaded with drops of mist, coiled and deadly.

Wire.

There was a good deal of it, a pale silver grey, wound into a ring about a foot across, and weighted down with a piece of wood. One end of it led up the main side post of the wing and was fastened round it two feet above the level of the top of the birch. Fastened, I saw, very securely indeed. I could not untwist it with my fingers.

I went back to the inside wing and had a look at the post. Two feet above the fence there was a groove in the wood. This post had once been painted white, and the mark showed clearly.

It was clear to me that only one person could have fixed the wire in place. The attendant. The man whom I myself had seen walk across from one side of the course to the other. The man, I thought bitterly, whom I had left to help Bill.

In a three mile 'chase at Maidenhead one rode twice round the course. On the first circuit there had been no trouble at this fence. Nine horses had jumped it safely, with Admiral lying third and biding his time, and me riding alongside telling Bill I didn't think much of the English climate.