Today it’s the moon that has him thinking of long ago, but lately anything might do it: leaves blowing over the river, the goosegirl driving her angry geese along the road, the clatter of hooves on the bridge. The turtles. He built the turtle pond in the first month of his exile, a gesture of defiance: you will not make me other than I am! As though anyone in this district would understand the pond’s significance to an alchemist, or care.