The Lee Moorhouse Photographs collection contains approximately 1,500 glass plate negatives stored at the Umatilla County Historical Society. All plates have been digitized, and approximately one thousand of them were selected to be uploaded to the Whitman College and Northwest Archives online archival database. The photos were taken by Major Lee Moorhouse between 1897 and 1915. Moorhouse is most well-known for being the Indian agent on the Umatilla Indian Reservation from 1889 to 1891.