Collection consists of materials by or belonging to John B. Horner that concern Oregon-related historical topics. These include diagrams and documents concerning the Kalapuya mounds; the text of an address Horner delivered to the Oregon Pioneer Association; and a letter from Gertrude Balch Ingalls with a biographical sketch of her brother, Frederic Homer Balch. Horner (1856-1933) taught English and history at Oregon Agricultural College (now Oregon State University).