Killian Hill Road is still gray at six in the morning, and the grass along it holds the night's dew like a held breath. Ace Yards LLC starts there, in the one hour when a Lilburn yard is cool enough to work and the mower leaves a dark track through all that silver. Mowing, edging, trimming, cleanup — the ordinary week of a lawn, taken in order until the whole property reads as deliberate. By the time the buses come down the hill the drive is blown clear and the edge along the walk runs sharp as a pencil line. There is a good feeling in handing a yard back before the day has fully started.