Half of Carmel is stitched together with old stone walls, laid up by hand and now half-swallowed by oak and hemlock. GOAT Landscaping Inc. keeps lawns in that kind of country — grass running up to granite ledge, shade shifting hour by hour, the ground never quite level. Mowing, trimming, edging and seasonal cleanups are the trade, and by September the work begins tilting toward the first fallen leaves. Grass grown on thin Putnam soil rewards attention: cut at the right height and edged clean along the walls, it looks like it belongs exactly where it is. Carmel is worth that kind of care.