Philip T. Blair was born to George Elias Blair and Nellie May Thatcher in 1896. He was the great-grandson of Brigham Young, second president of the Church of Jesus Christ of Latter-day Saints and territorial governor of Utah. The Philip T. Blair family papers (1836-1968) contain pertinent information concerning the early development of the Mormon church as well as covering an important epoch in early Utah history. It describes the social, religious, economic, and political development of the state through correspondence, documents, and memorabilia. Spanning a period of four generations of a family, it commences in 1836 with some of the earliest known personal correspondence of Brigham Young and his wife Mary Ann Angell Young.