This collection contains newspaper clippings, photographs, documents and other material collected by Harry W. Lawton pertaining to the experiences of 19th-20th century Chinese immigrants in California, primarily in the Inland Empire region of Southern California. Includes material regarding the archaeological dig at the former Chinatown site in Riverside, California, research material that was used in the book Wong Ho Leun: An American Chinatown, and a selection of newspaper clippings compiled by Lawton on the early Chinese immigrants that settled in Southern California.