At the Pound Ridge Cemetery, a stone wall runs along West Lane, its rocks stacked neatly atop one another, but one 25-foot section of the wall has crumbled away. Restoring that portion is the latest project of the Pound Ridge Stone Wall Rebuilding Club,... "The stone walls are an integral part of the community," said Josh Arnow, a 47-year-old investment manager who helped found the group. "The walls were originally built ... to separate people, and we are using the opportunity to rebuild walls as a way to bring people together, bring neighbors together." They fix the deteriorating structures the...