Before the bakeries open, the Old Port is a quiet grid of cobblestone and brick with the harbor breathing at the end of every street. Knight Property Services works that early hour all winter — plowing, shoveling entries and sidewalks, and laying down salt and sand where foot traffic will start soon. Cobbles and old granite steps hold ice in ways a flat suburban drive never does, and clearing them takes patience and a hand tool more often than not. The good version of this job is invisible: people arrive, walk in, and never think about what the storm did. Portland is home ground, with routes running into South Portland, Falmouth and Westbrook.