Provenance Image is a very small portion of a large map of Middlesex County MA, held at the Leventhal Map Library of the Boston Public Library, and available in an interactive form at http://www.leventhalmap.org/id/12690.
Reuse According to the Leventhal Library website at http://www.leventhalmap.org/faqs, their historical maps (prior to 1923) are not copyrighted.