Contains annual volumes of randomly organized reminiscences of his life, including childhood in Salt Lake City and Provo, Utah; scouting; family; missionary service; education and profession; the building of the Provo and Jordan River temples; and work at Brigham Young University, including interactions with Ernest L. Wilkinson and Dallin H. Oaks. Also includes addresses and poems by Lewis, an oral history, and Lewis family history. Materials dated 1944-2003 (bulk: 1988-2003).

Correspondence with Mormon Church leaders and Utah government officials, genealogies, histories, patriarchal blessings, autobiographies, scrapbooks, mementoes, photographs, yearbooks, and publications. The items relate to Muir and his family, his teaching and his business careers, and his work in the Mormon Church.