Midsummer dusk on Conesus Lake, and the mowers are still going in Livonia — cut grass on the air, the water below Lakeville going flat and silver. GOODWIN LAWN SERVICES keeps these lawns on a steady week: mowing, trimming close to porches and posts, edging the walks so the lines stay true all season. Lawns in this valley grow hard through July, and staying ahead of them means showing up whether or not it is convenient. By late October the leaves come down the hillsides toward the lake and the cleanups begin. A yard cut and cleared on a summer evening is worth sitting out in — that is the entire idea.