The Nephi L. Morris papers (1870-1943) consist of materials related to Morris' political, ecclesiastical, and business affairs. Nephi Lowell Morris (1870-1943) was educated at the Brigham Young Academy and the University of Utah, served in various capacities in the Church of Jesus Christ of Latter-day Saints, and was a popular speaker on religious and political subjects.

The Mountain Meadows Monument Foundation records (1850-2012) consist of the foundation's newsletters, documents, newspaper and periodical articles, transcriptions of audio tapes, and information on the monument established as a memorial to those who were killed in the Mountain Meadows Massacre of 1857.

The Oscar W. and Mary Preston Moyle papers (1889-1945) consist mostly of Moyle family diaries and papers. The correspondence is personal and covers family matters as well as comments on the general state of the world. The bulk of the correspondence is to and from Marion Moyle Shenon and her mother, Mary Preston Moyle. Also included are letters from all of the children to their parents and to each other, as well as family friends.

The Mary Bennion Powell Muhs papers (1972-1973) contain letters from Muhs a former student to Sterling M. McMurrin, dean of the Graduate School at the University of Utah, asking McMurrin to preserve the story of her father's polygamous marriage after the turn of the 20th century and its effect on her family. Includes a photocopied holograph and a typescript of the incomplete work titled "A Utah Idyll."

The William Mulder papers (1918-2008) consist of his correspondence, articles, original manuscripts, and early diaries.

The William Mulder photograph collection consists of his personal materials related to family and clubs to which he belonged.

The Ina Mae Murri papers (1977-2007) contain correspondence, newsletters and articles pertaining the Murri's life and involvement in Lesbian, Gay, Bisexual, Trans, Queer/Questioning, and others (LGBTQ+), and Mormon feminist activism.

The A. Milton Musser papers (1952-1948) consist of typescripts of diaries (1852 and 1869 February-April), a handwritten index of Musser diaries (1852-1857), and a biography detailing associations with early LDS Church leaders as well as everyday activities. Collection includes a handwritten letter (dated 1948) about gold coins minted by the LDS in Salt Lake City. Musser was a traveling bishop for the LDS Church from 1858 to 1876.

The Joseph W. Musser papers (circa 1930s) are notes from a book of remembrance by Musser, but also include a great deal of notes, usually about dreams and visions, by Lorin C. Wooley. Both Musser and Wooley broke from the LDS Church over the issues of the cessation of polygamy and priesthood in the early 20th century.

The Percy Livingstone Myer pamphlet (1945) is titled, "The Symbolic Stones of the Butteresses of the House of the Lord in Salt Lake City and their Significance." Myer (1895-1987), an engineer, also wrote other pamphlets on related LDS themes.

The Clara Jenson Myers biography of Hannah and Peter Jenson (1956) details the life of her parents, Hannah and Peter Jenson, Swedish converts to the LDS Church. Myers also includes some of her own reminiscences of her life prior to marriage.

The National Organization for Women photograph collection contains images of a march and rally organized by the Utah Chapter in Salt Lake City on October 2, 1982.

The Native Born prophecy consists of an undated two-page "prophecy" foretelling the destruction of the United States for alleged wickedness toward the LDS Church. It is addressed to "Thomas, West, Baskin and all other despotic, tyrannical, fools..." and signed "Native Born."

The Nauvoo City Council records (1841-1845) contain dates and descriptions of Nauvoo City Councils. Various topics are discussed in these councils such as brothel penalties and laws for rabid dogs. There is also an excerpt of diary entries from William Law and his dealings and experience with the Nauvoo City Council.

The Nauvoo High Council transcription of recorded minutes of meetings (1840-1845) are of the Council of The Church of Jesus Christ of Latter-day Saints (LDS Church).

The Nauvoo steel engraving presents a landscape of Nauvoo and the Mississippi River.

The Nauvoo Temple sealing records (1849-1857) contain a document of sealings and adoptions pertaining to the Church of Jesus Christ of Latter-day Saints (LDS Church) Temple in Nauvoo, Illinois, and Salt Lake City, Utah.