Down on the flats the houses sit close to the road, and by evening the porch lights come on one at a time along it. Wahl's Lawn Service aims to be finished by then — the last lawn on the list mowed, trimmed and blown clean while there's still light left on the grass. These are Allegany Reservation yards, most of them modest, every one of them seen by whoever drives past. Keeping them even week after week is quiet work, and it's the kind that shows from a hundred feet away. Fireflies come up out of a fresh-cut lawn like it was made for them.