Late August on the Walton Park streets: long shadows, sprinklers ticking, and the smell of a lawn cut an hour ago still hanging in the warm air. Lewis Brothers Landscaping puts that smell in the neighborhood — mowing at the right height for a dry stretch, trimming into every corner, edging until a drive reads as a line instead of a suggestion. Spring cleanups clear the winter sand and matted thatch; fall cleanups take the leaves down before the first wet snow glues them flat. Falmouth is the center of the work, with Portland, Westbrook and Cumberland close by. A yard that looks easy took somebody a morning.