Derry keeps its old stone walls out in the woods, long after the fields they once bordered grew back in. Advanced Tree Service tends the lawns that open in front of those walls, on the rolling ground east of town where almost nothing sits level. Late April is the hinge of the year here — the ground firms up, the mowers come out, and the first cut leaves a whole yard smelling green. There is a plain satisfaction in a crisp edge along a front walk, and in a lawn raked out and standing up again after a winter of being pressed flat. Frost's old farm is just down the road, and that plainness is still the point: a yard looked after, week after week, and left looking cared for.