West of the Merrimack, Rock Rimmon's ledge stands over the neighborhood like an old shoulder of granite, and the yards below it run in narrow green ribbons between the houses. 603 Yard & Tree Service keeps those ribbons cut clean — mowing on a schedule the grass can feel, trimming the corners a mower can't reach, and hauling away clippings and fallen leaves before they mat down. There is real satisfaction in the last pass of an afternoon, when the rows line up and the border along the walk reads like a drawn line. Manchester's soil runs sandy and goes tan fast in August, so the work is as much about timing as about blades. Come October the oaks let go all at once, and the yard gets put back in order until it looks like nobody ever had to rake it.