Cold air slides off the ridges at night and pools in the Hamburg bottomland, so the valley wakes under a low sheet of fog most September mornings, burning off around nine. JWSR LLC starts in that hour, when the grass is still silver and the day hasn't decided how hot it intends to be. The work is steady rather than dramatic: mowing on a schedule, trimming close, edging drives and walkways, stripping a yard clean in spring and autumn. Sussex County lawns take frost early and green up late, and knowing that calendar is most of the craft. What's left behind at the end of a route is a row of properties that all look like somebody lives there and cares.