Down at Townsend Harbor the water sits flat behind the old mill dam, and September lays a first yellow across the yards along it. HW Landscaping mows, trims and edges those lawns from the first flush of spring growth to the last cut of the year. Cleanups come twice — once to clear off what winter left behind, once to take the leaf fall down to bare, breathing grass. There is a particular pleasure in a lawn finished just before the light goes, the lines still fresh, the walk swept off behind you. In Townsend that is the job, and it is enough.