This isn't really such a mystery: the photographer's blindstamped logo at lower right identifies the location in which he worked -- which likely is within a few miles of the location of the school. An historical society near Palmer, Mass., may be able to pinpoint which school this was. Palmer is just off the Mass. Turnpike (I-90), east of Springfield. Perhaps the Quaboag Historical Society in nearby West Brookfield could direct you. Their secretary's email address is: Mlmerr@mail.ccsinet.net.