Philip Schaff (1819-1893) was a theologian, church historian, ecumenist, and Union Theological Seminary professor. Schaff was president of the American Bible Revision Committee, which he organized in 1871 at the request of the British Committee on Bible Revision. The collection contains correspondence, including from the American Bible Revision Committee and the British Committee on Bible Revision; notes and lectures; diaries; and scrapbooks and memorabilia, including a photograph album.