When a nor'easter reaches South Boston it comes sideways off Pleasure Bay, and by midnight the drifts have picked their own places to sit. Boss Plowing runs through those hours, clearing driveways, back lots and the walkways people actually use to reach the corner. Salt goes down where the melt will refreeze — the shady side of a building, the bottom of a sloped drive. Between storms the work is watching the sky and being exactly where the route says to be. Morning comes, the wind lies down, and the pavement is open.