Letters from C. C. Augur and William C. McKay to Thomas M. Anderson (1836-1917), discussing topics relating to the history of the Pacific Northwest. Anderson was a U.S. Army officer who commanded the 14th Infantry at Fort Vancouver, Washington, in the 1880s and 1890s and who fought in the U.S. Civil War and the Spanish-American War.

Collection includes research notes and correspondence regarding Harry C. Blair's work on a biography of Colonel Edward Baker, which he co-authored with Rebecca Tarshis, and on Dr. Anson G. Henry.

Typescript draft speech delivered at the celebration of the 100th anniversary of the discovery of the Columbia River, May 11, 1892, with corrections.

Manuscript letters from John Hailey, librarian and secretary of the State Historical Society of Idaho, to W. H. (William Henderson) Packwood, January 30 and February 27, 1912, regarding Northwest history and early Oregon figures.

The Old Oregon Trail, Inc. was a patriotic, non-profit organization responsible for identifying and erecting markers on pioneer western trails and otherwise recognizing and preserving western history. Collection includes correspondence, 1943-1957, primarily regarding membership; minutes, 1946-1954; financial records, 1949-1956; corporation record, 1952-1956.

Typescript of "An Outline of the Pacific Northwest" by Ceylon S. Kingston and J. Orin Oliphant. Authors' working copy, with bibliographic citations pasted in and some handwritten marks.

Typescript photocopy of journal entries made by Alexander Ross from March 11, 1824, to April 22, 1824, during an expedition in the Pacific Northwest. Ross (1783-1856) was born in Scotland and became known as a pioneer and fur trader in Canada and the Pacific Northwest. He worked for the North West Company and Hudson's Bay Company.

Collection includes research notes regarding Oregon and Northwest history. Theresa Truchot was a local historian of early Lake Oswego. She was the author of many publications and conducted oral histories of early Lake Oswego residents. She initiated the Junior Historical Society and was a speaker on local history topics.