William Buckhout Greeley (1879-1955) was chief forester of the U.S. Forest Service from 1920-1928, and then became secretary-manager of the West Coast Lumbermen's Association.The collection consists of diaries, correspondence, articles, manuscripts and photographs.

Myron Griffin was an author who published stories in American magazines and a graduate of the University of Oregon. The collection contains drafts and revisions of manuscripts, notes, story ideas, photographs, and professional correspondence.

Collection comprises newsletters, church reports, personal correspondence, sermons, special interest reports, and diaries of Adam and Clara Groesbeck, Baptist missionaries in the Kwangtung province of South China from 1897-1927 and 1931-1935.

Elgin E. Groseclose (1899-1983) was a writer, professor, specialist in finance, and treasurer for a financial and investment consultant firm. He was also involved in other interest groups that appealed to his deeply religious beliefs. The collection includes correspondence, diaries, speeches, writings, financial material, valuations, organizations and photographs.

Nancy Gurney (1915-1974) was a writer of children's books. The collection includes illustrations and manuscripts that reflect her work and collaboration with her husband, Eric Gurney.

Arthur M. Guttery (1885-1981) was a Protestant minister and missionary for the Y.M.C.A. The collection contains sermons, religious addresses, essays on China, correspondence, and memoirs of Y.M.C.A. workers in China.

Grace E. Hall (?-1939) was a journalist, author, and poet. Collection consists of manuscripts of her books, articles, speeches, vignettes, poetry, clippings, and miscellaneous items.

Bernard Daly (1858-1920) was a Lake County, Oregon judge. He also served in the Oregon House of Representatives and State Senate. The collection consists of correspondence, legal documents, speeches, newspaper clippings, scrapbooks, and artifacts.

William H. Hammond (1908-2001) served in the military during World War II and in state agencies in Oregon for much of his career. He was active in fraternal organizations including the Kiwanis. The collection consists of documentation of Hammond's career and colleagues.

Irene Forsythe Hanson (1898-1976) was a Christian missionary in Tsingtao (Qingdao) and the countryside of China from 1926 to 1951. The collection includes correspondence, publications, newspaper clippings and a diary that reflect her work as a missionary.

Edward John Hanzlik (1886-1959) was a graduate of the University of Washington College of Forestry, 1912 and spent most of his career in the Pacific Northwest in the field of forest management. The collection contains field diaries, articles, an account book, Xi Sigma Pi correspondence, and photographs.

Florence M. Hartshorn (1869-1943) was a photographer who lived in the Yukon during the gold rush. The collection consists of an album and loose prints made by Mrs. Hartshorn and her husband, documenting the landscape of the region, entrepreneurs and residents.

Collection comprises three albums of architectural photographs, circa 1910s-1930s, of Oregon high schools, banks, libraries, hotels, and residences designed by American architect Raymond W. Hatch.

The John and Ward Hawkins Papers comprise fiction manuscripts and teleplays, correspondence, non-fiction manuscripts, and screenplays by American writers John and Ward Hawkins.

Quail Hawkins (1905-2002) was a writer of children's books. The collection includes published works, book length manuscripts as well as short stories, musicals, articles and poetry. The collection also includes clippings and correspondence that reflects her work.

Martin Mason Hazeltine (1827-1903) and his brother George Irving Hazeltine (1836-1918) had a joint photographic studio in San Francisco 1853-1855. Martin Mason was active in Eastern Oregon and Idaho 1884-1903; George photographed in Northern California 1853-1861 and Eastern Oregon 1860-1892. The collection consists of eleven images from the 1880s and 1890s focused primarily on Oregon landscape, and Canyon City, Oregon.

Louis Heller (1839-1928) was an Ashland photographer noted for his stereos of the 1873 Modoc War, later distributed by Watkins. The collection consists of 23 Modoc War images, 21 of which are stereos.

The collection comprises general correspondence, a manuscript sequence series, subject files and scrapbooks by author and illustrator Le Grand Henderson.

The Heritage Documentation Programs records: Historic American Buildings Survey and Historic American Engineering photograph collection contains materials that document achievements in architecture, engineering, and design in the United States, and includes photographs, project narratives, and architectural drawings.

Binger Hermann (1843-1926) was a Roseburg attorney and politician who represented Oregon in the U.S. House of Representatives for sixteen years, and served as commissioner of the General Land Office (GLO) under presidents William McKinley and Theodore Roosevelt. The collection (1888-1920) contains Hermann's personal and professional papers.

Harry A. Herzog (1893-) was an architect in practice in Portland, Oregon, in the firm of Bennes & Herzog. Collection comprises architectural tracings, renderings, specifications and photographs for 27 commercial and residential architecture projects in the Portland, Oregon area by American architect Harry Albert Herzog.

The Historic print collection is an artificial collection created to highlight photographic processes. The collection is composed of daguerreotypes, cyanotypes, ambrotypes, tintypes, albumen prints, silver gelatin prints, color prints, negatives, and artwork. The photographs depict a wide variety of subjects, although the bulk of the collection depicts locations, people, and various events in the Pacific Northwest. Photographs of other locations across the United States are also present.

Hoedads Cooperative Inc. was a member-owned reforestation cooperative based out of Eugene, Oregon. The collection contains the working papers, audio and visual records of the cooperative, member and co-op correspondence, original newsletters, minutes and photographs.

Inez Hogan (1895-1973) was an educator, author, lecturer, and illustrator of books for children. Hogan is most noted for her animal stories, including a series about animal twins, and her "Nicodemus" series about a young African American boy and his family and friends. The collections consists of forty years of correspondence, literary manuscripts, illustrations, research materials, contracts, one scrapbook, photographs, publicity materials, and biographical information.

Ruth Langland Holberg was an author of books for young people, many of which were illustrated by her husband, Richard A. Holberg. Collection comprises diaries; correspondence; manuscripts of novels, short stories, poetry, and radio scripts; research material; financial material; and copies of her published works.

Ashley Elder Holden (1894-1994) was primarily a journalist but maintained dual careers in journalism and politics, running successfully for a republican seat in the Washington state legislature in 1932. Additionally, Holden published the Brewster Review, The Oriental Outlook, Tonasket Tribune, and, Saga of the Sagebrush.

Herbert C. Holdridge (1892-1974) was an author and presidential candidate, his main interests being conservative politics and fringe causes. The collection includes correspondence, background information for speeches, manuscripts, records for groups Holdridge founded, legal papers, pamphlets, reel-to-reel tapes, and copies of his published books.

Louis P. Hopkins was the division superintendent of the Southern Pacific Railroad. The collection (1910-1955) contains Hopkin's autobiography, and mementos including photographs the construction of railroad tunnels.

Walter Harold Horning was the chief forester for the Bureau of Land Management, adviser for legislation to control Oregon and California revested lands, proponent of Mt. Olympus National Park and Department of Conservation. The collection consists of Horning's school notes and his work papers, including correspondence, reports, field notes, and photographs.

Donald Lowry Houghton was a Concreate Engineer for EBASCO Services dam building projects, including the Pelton Dam built for Portland General Electric on the Deschutes River in 1958. The Donald Lowry Houghton Pelton Dam construction collection contains in house reports, catalogues, blueprints, letters, and documents detailing the construction of the first Pelton Dam.