The dining-room at Fenella’s club was one of those rooms where you don’t notice very much what the weather is like outside. At lunchtime in the middle of January the light would be on anyhow, so it was not until they had lingered over their coffee and Fenella remembered that she had an appointment to try an absolutely new hair-do that either of them noticed the fog.

“And if I really can’t drop you, darling, I’d better fly, or goodness knows if I’ll get there!” Ione’s “No-quite the wrong direction” was gathered up in the rush of departure. She stood for a moment on the pavement outside the club before deciding that it was no use trying to do any more shopping, and that she had better just walk round to the nearest Tube station and go home. At the time it seemed not only a sensible thing to do, but a perfectly easy one. She knew this part of London like the back of her hand, and the station was not more than five minutes’ walk. Yet before the five minutes were up she was lost.

She had somehow missed a turning which she ought to have taken. Well, that was quite simple-she must go back and find it. She turned, walked for another five minutes, and knew that she had got right off the track. And what was worse, she had walked into a much denser patch of fog. If it had been like this in front of the club, she would never have started out. As it was, she had no idea of how far she had come, or in what direction. She found that she had no ideas about anything. No amount of darkness is so bewildering as fog, since it not only baffles, but confuses every sense. The eye still sees, but what it sees bears no relation to reality. The ear still hears, but it can no longer decide what is near and what is far. Everything is unnatural, distorted.

Well, she must keep on walking. These London fogs vary very much in density.