This collection contains approximately 10,000 photographic negatives taken by photographer John Cuthbert Williams while operating a commercial photography studio in Boise, Idaho. The bulk of the images in this collection were taken for various advertising agencies, including Cline Advertising, Belcher-Bagley Wehren Advertising, and Johnson and Associates. Subjects include agriculture, office and public buildings, and businesses in the Boise area.

10 color prints taken by Richard Kendall Arnold in 1999 of advertisements on rocks on the Rocky Canyon stagecoach route between Idaho City and Boise.