Early on a June morning the river fog sits low in the Deerpark valley and a heron stands still in the shallows until the sun burns the mist off the water. Green Heron Lawn Care LLC is out at about that hour, dew still on the blades, cutting the lawns that run down toward the Neversink and the Delaware. The pace suits the place — a clean pass, a tight trim around the well caps and the fence lines, an edge that follows the walk instead of wandering off it. Come autumn the work turns to clearing leaves off those same yards, and in spring to opening them up again after the valley's long cold. Grass, light and river air: a simple set of things, kept well.