Out at East Rochester the Salmon Falls River marks the Maine line, and evening light comes over the water long and flat. Two Brothers Landscaping mows the yards on this side of it — weekly cuts, trimming, edging, and the cleanups that open the spring and close the fall. Two sets of hands make short work of a property: one on the mower, one on the trimmer, and the yard is finished before the shadows reach the road. A straight line along a driveway is worth the extra minute it costs. Rochester knows the difference between a lawn that was cut and one that is kept.