New York City, October 26, 2015

★★★★ An acorn, fallen from a street tree’s branches to the unyielding paving bricks, crunched underfoot. The air in the subway was too hot for a jacket over a sweater, and it took a block-long walk in the chilly topside air to dispel the aftereffects. The climate control in the office had finally found a stable and seasonable setting. Color was out of the pedestrians, bundled in dark clothes at midday, and color was spreading in the trees. Over Union Square, the dome of a mature treetop was as bright as taxicab paint. In the cross street uptown, the yellow of the honey locusts tinted the evening light.