The J. Ross Clark Scrapbook dates from approximately 1897 to 1972 and consists of newspaper clippings collected by his wife, Miriam Evans Clark. The clippings relate to professional events in the lives of J. Ross Clark and his brother, Senator William A. Clark. A small number of the clippings refer to births, marriages, and deaths in Miriam Evans and J. Ross Clark's families. Also included are documents written by J. Ross Clark's grand-niece, Dorothy Murdock Dunkley, that offer additional information about the Clark and associated families.

The Arthur and Joe Lyon Papers (1930-1935, 1985, 2020) document the first transnational automobile trip taken from North America to Central America in 1930 by Arthur and Joe Lyon, two brothers from McDermitt, Nevada. The materials in this collection include Arthur and Joe Lyon's passports with stamps from their trip and their travel scrapbook. Materials also include the brothers' handwritten notes about their trip from the 1930s and original typescript for Central America Through a Windshield written in 1985. The collection also includes a published hardcover copy of 1930: From Manhattan to Managua, North America's First Transnational Automobile Trip published in 2020.