This collection contains the papers of Parley P. and Theresa Black as well as Henry and Maria Yeates, with the bulk of the collection consisting of Parley's papers. Parley Black's papers consist of his missionary correspondence to Theresa Neel and other family members, financial information and rental agreements, and miscellaneous theater programs and receipts. It also contains financial information about Henry and Maria Yeates which consists of an 1892 territorial tax receipt and a letter from Reed Smoot concerning Maria's pension. Of particular interest are letters from Reed Smoot and the First Presidency of The Church of Jesus Christ of Latter-day Saints, consisting of President Joseph F. Smith and his counselors John R. Winder and Anthon H. Lund. There appears to be no connection between the Yeates and Blacks.

Because there is no known relationship between the two families, this collection keeps each family's papers separate. The Yeates' papers appear first because it contains the oldest document, the 1892 tax receipt. Following the Yeates collection are the Black papers, which are arranged categorically.

Researcher Note: Folder 9 contains letters written from Parley P. Black to Theresa that were written on unique, bark-like paper. These letters are folded and are very brittle. Also, the writing is faded on the back side and is difficult to read. Particular care should be taken when handling these letters.