Papers of the American clergyman, lawyer, Episcopal bishop, who wrote and spoke on the church and social problems, Christian and legal ethics, pastoral psychology, psychical research, and spiritualism. Collection includes correspondence (family letters, personal, and business correspondence); notebooks; professional records relating to Pike's legal career and ecclesiastical appointments as Dean of the Cathedral of St. John the Divine and Fifth Bishop of California, among others; writings (manuscript and/or typescript articles and essays, book reviews, books, interviews, sermons, and speeches); and memorabilia (awards, financial and legal records, photographs, and scrapbooks).

The papers of the American lawyer, activist for separation of church and state, legal counsel for the American Jewish Congress, and director of its Commission on Law and Social Action consist of correspondence, legal briefs, dockets, court transcripts, essays, speeches, and printed material, including articles, clippings, pamphlets, periodical issues, and general files relating to civil rights, federal aid to education, prayer in public schools, and other church-state issues.