Chelmsford granite went into the Bunker Hill Monument, and you can still find its rougher cousins stacked into the old field walls threading through town. Mike's Masonry and Landscaping LLC mows the lawns those walls enclose — grass cut on a regular turn, borders trimmed tight to stone and post, clippings cleared off so nothing yellows underneath. Summer up this end of the valley can go dry and bright, and a lawn cut at the right height carries through it far better than one scalped. Spring and fall each get their own cleanup, with leaves and winter debris hauled away rather than blown into the neighbor's hedge. Old stone, kept grass, a yard that reads finished.