Three in the morning, six inches down and still falling, and the roads around the Harvard common belong to the plows and nobody else. Jarvis Landscape Contractors is out in that hour, working driveways and lots and the long dirt approaches that wind back off Depot Road and Littleton County Road, where a storm can shut a household in until somebody shows up with a blade. The job is plowing, stacking the banks where they will not blind a driver backing out, shoveling steps and walks by hand, and sanding whatever will glaze over by daylight. Harvard takes the wind off open fields, so what fell at midnight often drifts back across a cleared drive by four, and it gets cleared again. Getting a family out on time after a storm is the entire measure of the work.