Correspondence (ca. 1889-1985); legal documents (1898-1931); patents for window construction (1921-1922); a list of other contributors that assisted Horner in his research.

An unfinished typescript with hand corrections of J. H. Horner’s work, Wallowa River and Valley. The manuscript details the history of the Wallowa Valley region in northeastern Oregon from approximately 1805 through 1950. The document includes extensive details on the origins of many place names in the region. The manuscript also includes a history of the Nez Percé people and their cultural traditions which Horner wrote in collaboration with Otis Halfmoon. Topics covered in the manuscript include Chief Joseph and the events of the Nez Percé war of 1877, settlement of the Wallowa Valley region, and local participation in World War I and World War II. John Harland Horner (1870-1953) was born in Kansas City, Missouri, and moved to Enterprise, Oregon, in 1911. He served as Wallowa County's deputy assessor from 1918 to 1924, before being elected county assessor in 1924. Horner also had a long-standing interest in the history of Wallowa County. For more than thirty years, he collected historical information and interviewed most of the area's early settlers and local Native Americans.

This oral history interview with Erskine Wood was conducted by William Renwick at Wood's home in Vancouver, Washington, on August 21, 1954. In this interview, Wood discusses his experiences as an adolescent living with Chief Joseph and the Nimiipuu people (Nez Perce) in the Wallowa Valley, Oregon. He briefly talks about Chief Joseph's life story. He speaks about his daily life, including caring for horses, hunting, and taking sweat baths. He closes the interview by describing Nimiipuu recreational activities, including dancing, singing, and games. In the interview, Wood uses terms for Native people that were common in that historical period but that are now considered pejorative.

This oral history interview with Erskine Wood was conducted by Pierre Kolisch and Marian Wood Kolisch on July 11, 1974. The interview was part of a series conducted by Kolisch to accompany portraits of Oregon artists, businesspeople, and politicians. Louise Wood was also present and occasionally contributed to the interview.

In this interview, Erskine Wood discusses spending summers with Chief Joseph and the Nimiipuu (Nez Perce) people in the Wallowa Valley, Oregon. He describes daily life, discusses living conditions on reservations, and talks about recreational activities, including horse races and games. Pierre Kolisch discusses his plan to visit members of the tribe in Idaho. Wood talks about photographs he took on glass plates while visiting Chief Joseph. He closes the interview by briefly discussing some of the artists that were acquainted with his father, C. E. S. Wood.