Sanborn Maps (old fire insurance maps) are available in color at the Nevada Historical Society in books. The Washoe County Public Library Reno (downtown) branch has some on microfilm that are in black and white but the microfilm is not in the best condition. However, the University of Nevada Reno (UNR) has some of these maps digitized and on line. They are pre-1900 to 1923 for Nevada cities, including Reno. Thank you to Marc Tiar at WCPL Reno branch for the above information.