Jonathan Bourne was a politician in Oregon at the turn of the twentieth century. In 1885 and 1897, he was a member of the Oregon House of Representatives, and was elected U. S. Senator in 1906. Considered a progressive, Bourne was a founder and president of the National Progressive Republican League in 1911 and organized the Republican Publicity Association in 1912. Most of the collection consists of U. S. Senate correspondence and case files. The Senate case files relate to topics which arose during Bourne's term of office, ranging from problems with the apple crop, through management of Indian affairs and reservations, to construction of public buildings, bridges and other projects in Oregon. There are folders on such issues as child labor, conservation, Chinese exclusion, and land law.