Sandwich sits where the lakes end and the mountains begin, and in July the light off Little Squam reaches a long way inland. Interlakes Irrigation Company keeps lawns green through the weeks when the rain forgets to come — mowing and trimming on a steady turn, edging where lawn meets path, and clearing what the pines drop across the grass. A lawn in a dry August tells you everything about how it was treated in June. Watching one hold its color while the roadside has gone brown is the quiet satisfaction of this trade. The lakes get the photographs; the yards deserve to look just as good.