Collection includes several forms of documentation of Don Byron Colton's participation within The Church of Jesus Christ of Latter-day Saints and a biography written by his wife, Grace S. Colton. Also included are several artifacts such as spectacles, a wooden hatchet, and ties.

Contains a Congressional Record that includes speeches made by Senator Wm. H. King and subjects that he dealt with as a senator. Materials undated, but from some time between 1917 and 1941 when King was in office.

Bound typescripts; clippings and letters (some photocopies). The collection includes a detailed personal journal, obituaries, articles describing Hafen's life, letters from private citizens and elected officials concerning legislation. The collection describes the observations, opinions and experiences of Hafen, his business, family, friends and politics.

Includes biographies and newspaper articles that describe Clark's life.

Includes various personal, business, and government correspondences. Several items contain signatures of well-known people, such as American and Mexican presidents.

Contains correspondence, and records relating to decisions regarding his estate.

Contains Clark's financial records including, but not limited to accounts–payable, accounts-receivable, bank statements, cancelled checks, checkbooks, copies of tax returns, disbursements, estate files, expense statements, farm bills, graph paper, income tax files, income vouchers, invoices, medical payments and claims, paycheck stubs, property list, property tax files, receipts, refunds, reports, Social Security files, tax guides, and work sheets.

Contains transcriptions and audio disk recordings of talks given at his funeral, and more obituaries.

Includes handwritten, typed, and shorthand diaries. Many are personal diaries from 1916 to 1961. Some of his diaries from the same time period are more business oriented. These include diaries about military service, ranches/farms/meat, cattle diseases, and several other subjects. Also includes his diary outlines and excerpts from his father's diary.

Includes letters and correspondence written to Clark just before or just after his death. It also contains obituaries, newspaper articles about his funeral, and letters requesting that his name be removed from mailing lists.