The Omer Call Stewart papers (1925-1989) consist mainly of personal items and published articles. Correspondence, news clippings, diaries, book reviews, articles, and student papers are included. Omer Call Stewart (1908-1991) was an an anthropologist from Utah who spent most of his professional career at the University of Colorado.

The Rudolf Stockseth diary (1890s) includes personal and spiritual musings. Much of it is written in Norwegian.

The Enos and Jemima Child Stookey family biography consists of a bound biography of Enos Stookey (1829-1889) and Jemima Child Stookey (1827-1914) and their children that has been compiled by Gwenevere A. Stookey and Corrine S. Dods. Enos and Jemima Child Stookey were LDS pioneers who moved from Belleville, Illinois, in 1855 to Salt Lake City, Utah, by wagon. After their arrival they moved to Rush Valley, Utah, and were some of the first established settlers in this area.

The Reed A. Stout papers (1939-1997) contain correspondence, a diary, and reviews of the writings of D. Michael Quinn, a Mormon historian. Stout was an attorney and trial lawyer.

The Ernst F. Sturm papers (1901-1916) contain a journal and a personal letter. Both relate to the LDS splinter group "The Living Kingdom of God/Eastmanites," led by Samuel Eastman. The letter is addressed to Edward Janoschek. The journal is a compilation of notes from their meetings and of personal writings.

The George W. Taggart papers (1846-1847, 1978) consist of a typescript of Taggart's journals and letters to his wife, and a brief postscript to the story written by his grandson, Spencer L. Taggart. The originals are located in the LDS Church Historian's Office.

The James Edward Talmage papers (1876-1933) consist of a resume of Talmage's private journals, correspondence and laboratory record books, spanning his career as scientist, educator and LDS apostle.

The George S. Tanner papers (1912-1992) contain personal and family materials related to George Tanner, a teacher and historian. Included are correspondence, arranged chronologically and alphabetically; biographies and autobiographies; journals and family histories; financial and medical records; writings and speeches; newsletters and news clippings; programs and brochures; and materials relating to the Church of Jesus Christ of Latter-day Saints (LDS Church).

The Lethe Coleman Tatge papers (1928-1982) consist of diaries and scrapbooks relating to the life of Tatge, a long-time resident of Murray, Utah. Included is a scrapbook of letters by Tatge that were published in The Wasatch Wave. They relate to the various travels that she took and individuals from Wasatch County that she came in contact with. The diaries and scrapbooks are photocopies of the originals.

The Elmina Shepard Taylor diary consists of a photocopy of the original which was written while her husband was serving an LDS mission to England. Elmina was the wife of George H. Taylor.

The Fern Smoot Taylor family papers (1854-1856, 1901) consist of a glossary and account book, by Isaac Bullock. Included in the collection are letters written to LDS missionary Abraham Owen Smoot III as a serially numbered round-robin letter from family members.

The George H. Taylor autobiography and diary (1886) consist of a transcript of an autobiography of George H. Taylor, an LDS bishop, written while serving a prison term in 1886 for polygamy; transcript of a diary recounting his prison experiences, 1886. Taylor was an LDS bishop imprisoned for practicing polygamy.

The Jane Ballantyne Taylor diary (1846-1872) begins with an entry on 16 February 1846 describing her departure from "the city of Joseph." The book contains both dated diary entries and descriptions of events written many years later. There are also financial entries for the 1850s and notations of birth and death dates written in 1872.

The Joseph Edward Taylor diary [typescript] (1849-1877) consists of brief entires that cover certain events in Taylor's, and his family's, life. The diary covers events in Taylor's life such as converting to the Church of Jesus Christ of Later-day Saints (LDS), in England, his trip aboard a steamer to New Orleans, his travels from Council Bluffs across the plains to Salt Lake City, and the "Utah War" and the impact of the army at Fort Bridger and Camp Floyd.

The Ossian F. Taylor papers (1851 and 1909) contain an overland diary, a transcript of the diary, and a photocopy of the Taylor family genealogy. Taylor was born in Maine. Although not a member of the LDS Church, he traveled to Utah with members of his family who were members.

The George Teasdale papers (1770-1984) contain information regarding George Teasdale, an apostle for the Church of Jesus Christ of Latter-day Saints (LDS). Included in the collection are diaries, patriarchal blessings, correspondence, certificates, agreements, tax and financial documents, property deeds, notes, genealogy charts, and memorabilia. The collection is divided into three sections: personal, family, and religious materials.

The George W. Teasdale diaries and correspondence (1909-1936) consist mainly of correspondence between George W. Teasdale and his step-mother from 1910 to 1911. Teasdale was serving a mission for the Church of Jesus Christ of Latter-day Saints during these two years. Two diaries resulting from his service are also in the collection.

The Thatcher family papers (1881-1904) consist of the missionary journals and letters of Roy Davis Thatcher and Diana Bean Thatcher.

The Moses Thatcher diaries consist of 4 volumes of photocopied originals and 1 original diary written by Thatcher of his LDS Church mission to Mexico and the British Isles.