In the First Person: Index to Letters, Diaries, Oral Histories, and Other Personal Narratives [freely available electronic resource]
Defunct? "In the First Person is a free, high quality, professionally published, in-depth index of close to 4,000 collections of personal narratives in English from around the world. It lets you keyword search more than 700,000 pages of full-text by more than 18,000 individuals from all walks of life. It also contains pointers to some 4,300 audio and video files and 30,000 bibliographic records. The index contains approximately 20,500 months of diary entries, 63,000 letter entries, and 17,000 oral history entries."