On certain autumn afternoons there is a brief passage — if you are lucky you may get ten minutes to appreciate it — when the sun has drifted low and the afternoon breeze has calmed and the light reflects off the surface of the river as from a mirror, doubling the trees and the intensity of their lingering color, and the earth gives the illusion of brightness. The season and the hour have so muted the wood’s palette that the russet of late-hanging leaves calls louder than crimson in June. The sudden splash of gold away downstream beckons like summer’s lost oasis. But the bare arms of sycamore and ironwood make a stark fence against it, and it recedes from my approach — the light, the afternoon, the year. The vestigial warmth of summer dissipates like a mist; winter seeps from the earth and fills its absence.