Source: Sanborn Map Company, 1913, Vol. 1; Republished, 1951.
Library of Congress, Geography and Map Division, Sanborn Maps Collection website (accessed 9/8/2022).
See “Image 22” online: https://www.loc.gov/item/sanborn02127_008/
Source: 2022 Google Maps view of the building known as the Lorden Building, located in Davis Park/Founders Landing, maintained by the Rockford Park District.