Insurance maps of New London, including Groton, Connecticut.Sanborn Map Company, issuing body1921Sanborn fire insurance maps are a rich source of historic data on the urban built environment of North America during the 19th and early 20th centuries. The atlases were created for the purpose of underwriting fire insurance policies, which depended upon accurate and frequently-updated information about construction materials, municipal and transportation infrastructure, industrial and commercial landuse and more. The Yale University Library Map Department scanned its holdings of Sanborn fire insurance maps (consisting primarily of Connecticut towns) in order to make the maps more accessible."(3622). New London, Conn."Contains information on population, prevailing winds, water facilities and fire department.Includes index of streets and specials.Partial cadastral map.Sheets 1-40, 47, 50, 54-58, and 61-62 at scale 1:600 ; sheets 41-46, 48-49, 59-60, and 63-65 at scale 1:1,200.SMLMAPL 766 N47 1921: Sheets disbound. "Triplicate" stamp on all sheets. Library of Congress manuscript note on title sheet.The unnumbered leaves are the title, index, 2 map indices, and "Map of congested district of New London, Conn."; sheets 1-6 are duplicated as "skeleton" sheets.cartographic