After a storm the sun comes over the hills and the whole valley Dover sits in goes blinding white for an hour. JP Tree Works Inc. is usually still out in it — snow plowing, driveway and lot clearing, walkway shoveling, salt and sand where ice keeps forming in the shade. The north-facing side of a house never sees the sun in January, and that's where a second visit earns its keep. There's a plain pleasure in a route finished, every address open, nobody stuck. Then the forecast changes and it all starts over.