Saturday morning in an Algonquin subdivision has a soundtrack: a mower two streets over, then one street over, then yours. BlockMow works that way on purpose — one block at a time, cul-de-sac by cul-de-sac, so the trucks are never far and the schedule holds. Mowing, trimming and edging, done in the same order every visit, adds up to something a whole street can see from the corner. Curbs stay sharp, mailbox posts get trimmed round instead of chewed, and the strip between sidewalk and road stops being the part everybody forgets. It is ordinary work done attentively for neighborhoods in Algonquin and the villages beside it.