A lot hinges on small things. My shoelace came untied, and I stopped to do it up. The road had just turned a corner, and as I was bending over the offending shoe a man came right round and almost walked into me. He lifted his hat, murmuring an apology, and went on. It struck me at the time that his face was vaguely familiar, but at the moment I thought no more of it. I looked at my wristwatch. The time was getting on. I turned my feet in the direction of Cape Town.

There was a tram on the point of going and I had to run for it. I heard other footsteps running behind me. I swung myself on and so did the other runner. I recognized him at once. It was the man who had passed me on the road when my shoe came untied, and in a flash I knew why his face was familiar. It was the small man with the big nose whom I had run into on leaving the station the night before.