Serendipity

The foot on the step

Serendipity · 1881, told 1908 · Coutances, an omnibus

Coutances

DocumentA place-name from a first-person account of an idea arriving.

He had already worked. Then he stopped. Then the step.

Poincaré writes that he had been struggling. He went to Coutances. He boarded an omnibus. At the moment his foot touched the step, the idea came. He had no time to verify it until the ride was over. He later treated this as a fact about unconscious work, not about fate.

A pause is not a prophecy.

Concordance

The thing
A mathematical insight arriving as Poincaré boarded an omnibus, after incubation.
Seen
He puts his foot on the step. The Fuchsian functions, he says, were there.
Sourced
Henri Poincaré, Science et méthode (1908). English: Science and Method.
Miss
We have his memory of the step, written decades later. Not a notebook timed to the minute.
One question remains
What kind of arrival is an idea that comes when you are not hunting it?