I took the morning train from Paddington after two days of rain, when the fields had gone the colour of boiled tea and every hedge seemed to breathe. By the time we reached the bridge, the river below was not a river but a sheet of tarnished brightness, and the carriages felt like a thought moving faster than its language.

The modern thing is already half mist

People speak of the railway as if it is hard fact: iron, schedule, price, destination. Yet its first gift is uncertainty. It turns a church tower into a smudge, a pasture into a band of umber, and the passenger into a witness who can no longer claim a clean edge around anything he sees.

Speed does not sharpen the world. It asks the world to glow before it disappears.

Last February I returned to the same line with a notebook and a stubborn wish to count details. I recorded three gulls, one smoking kiln, and a row of labourers standing under wet elm branches; by Windsor all of them had merged into a single amber weather, more faithful than inventory.