Associated Factory Mutual Fire Insurance Companies. Mayo Woolen Mills Corporation "Mill No. 3" (Woolen Yarn), Millbury, Mass. Boston, Mass.: Associated Factory Mutual Fire Insurance Companies, 1934. Data of August 21, 1934. Data from F. A. Lougee. Traced by S. H. Mac Innes. 1 sheet. Includes plan of buildings (with dimensions), elevation views of individual buildings (with functions of building floors and rooms), and surroundings, including a few dwellings. Also includes very brief description of property, stock and product, and existing water sources and fire protection resources. Lacks isometric view of buildings. Several pencil notations on map dated 1934 and 1940. Pencilled above title: "Now known as The Delco-Rubber Co." Written below index number: "Canc 10/40." Serial number 26180. Index number 11925.2. Scale 1:480, 1 in. = 40 ft. 52.5 x 67 cm. (OCLC)