Associated Mutual Insurance Companies. Otis Company, Cotton Mill, Ware, Mass. Boston, Mass.: Associated Mutual Insurance Companies, 1906. Surveyed July 5, 1906. Surveyed and drawn by W. E. Dodge. 1 sheet (photocopy). Includes plan of buildings (with dimensions), elevation views of individual buildings (with functions of building floors and rooms), and surroundings. Also includes description of property, power and fuel, stock and product, and extensive description of existing water sources and fire protection resources. Lacks isometric view of buildings. See 1991.163.3 for full-size negative of this map. Serial number 7550, replaces 4868. Index number 3018. Scale 1:960, 1 in. = 80 ft. 50.5 x 61 cm. (OCLC)