Contains many letters, speeches, and articles written by Clark. Many are letters written to his family members in the holiday season, and the speeches and articles were often given at Brigham Young University-sponsored events or published in church magazines such as the Ensign. The letters were compiled by Clark's daugher, transcribed, and put in chronological order following his death, dated 1956 to 1977.

Contains printed transcripts of diaries, letters, and other materials created by Harold Glen Clark. The transcripts were created by Clark's children. The majority of the transcripts are from Clark's diaries, while others are categorized by subjects, including his mission to Sri Lanka, temple work, and photographs taken from the collections. Materials dated 1902 to 1979.

Audiocassette recording of farewell dinner program at Brigham Young University for Harold Glen Clark, which took place in the Sky Room. Dated May 13, 1971.

Compact disc recording from March 1984 of the funeral services for Harold Glen Clark, including comments from Elder James E. Faust.

Audiocassette recording of unidentified music. Dated 1967.

Audiocassette recording of conversation about the Clark family in Harold Glen Clark's home in Provo, Utah, on August 7, 1967. Includes Harold Glen Clark, his brothers, and sister.

Audiocassette recording of musical numbers performed by Harold Glen Clark and his sister, Mabel Clark King. Dated 1974.

Audiocassette recording of a musical performance of Sunshine of your smile by Harold Glen Clark. Dated 1975.

Audiocassette recording from March 10, 1975, of a family history interview with Harold's sister, Mabel. Includes musical numbers sung by Harold Clark and accompanied by Mabel.

Audiocassette recording from September 27, 1947 of Harold and Mabel performing "Perfect day" and "Memories." Includes a June 2, 1977 recording of "Memories."