Book collection named after U of I Regent Jerome J. Day, whose donated collection of western Americana was the basis for creating this collection.

Letter commenting on development of the Snowstorm Mine near Mullan, Idaho.

Film negatives and print photographs of Wallace, Idaho, the bulk of which spans the 1930s-1960s. The collection emphasizes downtown scenes, buildings, events, sports teams/leagues, various (sometimes unidentified) people, mining scenes, logging scenes, disaster scenes (floods, fires, plane crashes, etc.), and fraternal organizations.