Sanborn Map CompanyScale 1:600. 50 ft. to 1 in.Also shows factories, commercial occupancy of buildings, property boundaries and house and block numbers.Includes key to features of construction on title page [sheet 1].Fire insurance map hand colored to show building construction, locations of windows and doors, elevators, and available water facilities.Sheet 1 includestext, map index, and index to streets and locations.Partial cadastral map.20 maps, colored64 x 54 cmJPEGoai:digital.library.illinois.edu:f7ff92f0-4c61-0134-1dad-0050569601ca-81613237engSanborn Map Company8888-002PublicInsurance maps of Alton, Madison Co., Illinois, Nov. 1902MapsIllinois--AltonIllinois1903University of Illinois Urbana-Champaign