I could see a police notice advising me: If you see something, say something.

The nearest passenger to me was a Hispanic woman. She was across the car from me, on my left, forward of the first set of doors, all alone on a bench built for eight, well off centre. She was small, somewhere between thirty and fifty, and she looked very hot and very tired. She had a well-worn supermarket bag looped over her wrist and she was staring across at the empty place opposite with eyes too weary to be seeing much.

Next up was a man on the other side, maybe four feet farther down the car. He was all alone on his own eight-person bench. He could have been from the Balkans, or the Black Sea. Dark hair, lined skin. He was sinewy, worn down by work and weather. He had his feet planted and he was leaning forward with his elbows on his knees. Not asleep, but close to it. Suspended animation, marking time, rocking with the movements of the train. He was about fifty, dressed in clothes far too young for him. Baggy jeans that reached only his calves, and an oversized NBA shirt with a player’s name on it that I didn’t recognize.

Third up was a woman who might have been West African. She was on the left, south of the centre doors. Tired, inert, her black skin made dusty and grey by fatigue and the lights. She was wearing a colourful batik dress with a matching square of cloth tied over her hair. Her eyes were closed. I know New York reasonably well. I call myself a citizen of the world and New York the capital of the world, so I can make sense of the city in the same way that a Brit knows London or a Frenchman knows Paris. I’m familiar but not intimate with its habits. But it was an easy guess that any three people like these already seated on a late-night northbound 6 train south of Bleecker were office cleaners heading home from evening shifts around City Hall, or restaurant service workers from Chinatown or Little Italy. They were probably set for Hunts Point in the Bronx, or maybe all the way up to Pelham Bay, ready for short fitful sleeps before more long days.