Collection consists of correspondence by Lorenzo Lorain dating from 1855 to 1861, as well as biographical information about Lorain collected between 1958 and 1968. The bulk of the letters concern his time stationed at Fort Walla Walla and Fort Umpqua between 1856 and 1861.

Collection consists of photographs taken by or attributed to Lorenzo Lorain while stationed at Fort Umpqua in Douglas County, Oregon, between 1857 and 1861. They depict scenes around Fort Umpqua and the Coast Reservation, portraits of Native Americans and soldiers, and street scenes of Portland, Oregon City, and The Dalles.

Papers of Ray Lung, who managed the Klamath Indian Management Trust for United States National Bank of Portland from 1959 to 1975.

Oral history interviews with Lewis L. McArthur and Taz Conner were conducted on September 28, 1999. In these interviews, McArthur discusses his work on the Oregon Geographic Names Board, and Conner discusses his work to get land returned to the Wallowa band of the Nimiipuu (Nez Perce) people.

Oral history interview with Lewis L. McArthur conducted by an unidentified person on October 4, 1999. In this interview, McArthur discusses place names in Oregon and their relationship to Oregon's colonial history.

Reproductions of broadsides and pamphlets regarding Donald McKay's Medicine Show and his life as an Indian scout.

Photographs taken by Major Lee Moorhouse between approximately 1897 and 1919, depicting Cayuse, Umatilla, and other Native peoples and their settlements in the Columbia River Basin and Umatilla County; landscapes in Oregon and Montana; the Pendleton Round-Up in Pendleton, Oregon, and rodeos in other locations.

Five black and white photographs with handwritten notes on the back that identify the images as being taken along the Columbia River in October 1942. Four of the photographs depict Native people fishing from platforms, probably at Celilo Falls; one shows wooden buildings and parked cars.

Color lithograph depicting two Navajo riders on horseback. The lithograph was made for the U. S. Pacific Railroad Exploration and Survey Report, 1854.

Papers of Robert Newell (1807-1869), a trapper, emigrant to Oregon, and Indian agent. Includes a typescript copy of Newell's diary of an 1868 voyage from Portland, Oregon, to Washington, D.C., with Nez Perce (Nimiipuu) leaders; handwritten copies of letters regarding William Gray's "History of Oregon"; and Newell's account of the 1843 meeting at Champoeg, which formed the provisional government of the Oregon Territory. Only a small number of the items are original documents.