★★★ Pigeons banked against the bright sky. The winter chill at dropoff time quickly eased away. An orphan lump of snow, like a glacial erratic, sat near the middle of the sidewalk with a trail of meltwater leading away from it. Walking in a sweater with a parka slung over an arm was not as cold as wearing the parka was hot. Puddles filled the grooves left by tires in the curbside ice.