Abstract The David Oman McKay papers (1897-1983) contain correspondence, diaries, notebooks, scrapbooks, speeches, and sermons relating to the personal and ecclesiastical life of David O. McKay (1873-1970), ninth president of the Church of Jesus Christ of Latter-day Saints (LDS Church/Mormon Church). The collection is divided into four sections and also contains materials relating to members of McKay's family, including his wife, Emma Ray; his daughter, Lou Jean; and his son, David Lawrence (David L.)....