Field notes on adaptation, drift, and the long patience of islands.
The finches were never the point. What the collection showed, years later and by other hands, was that a single founding population can fracture along the edges of what it can eat. Seed size did the work that no observer noticed at the time.
The measurements sat in a drawer for two decades before anyone asked them the right question.
Eight years spent on a single subclass looks, from outside, like a detour. From inside it was the apprenticeship: the discovery that variation is not noise around a type but the material itself.
Deep time is the hardest idea to hold, harder than descent with modification. The mind grants centuries readily and refuses millions. Most objections to gradual change are, underneath, objections to arithmetic.