I am trying to date a photo taken of two of my ancestors. I believe they came from McHenry County, but the photo lists both Marengo in McHenry and Belvidere in Boone County. The name of the studio on the photo is:
"Aristo Photos. Clark & Nott, Belvidere/Marengo, Illinois."
Any help to determine when this studio was in operation would help me determine when the photo was taken. Thank you. Meghan