This collection consists of ten diaries belonging to J.S. Hyatt. They provide insight into his day-to-day life and his work as a civil engineer, with the majority of the diaries documenting various appointments and meetings.

The Ruth Hendrickson Wood Diaries record her day-to-day life. They contain writing about daily activities, oftentimes noting the weather. The diaries include musings on social engagements and other events. They have also been used to keep track of scheduled appointments and travel dates.

These travel diaries are written by Jean Brown. The diaries contain handwritten entries recording Brown's daily life while traveling in South Africa and later Micronesia.

Both diaries contain other materials including postcards, tourist maps, hotel memorabilia, various brochures and guides, newspaper and magazine clippings and photographs.