"Parley and Orson Pratt" by Dale G. Renlund (April 2018)
Orson Pratt Homesite
Orson Pratt - Relationship with Brigham Young
Orson Pratt - Brilliant Man
Orson Pratt, Sr. was an American mathematician and religious leader who was an original member of the Quorum of Twelve Apostles of the Church of the Latter Day Saints. He became a member of the Quorum of the Twelve of The Church of Jesus Christ of Latter-day Saints and was a leading Mormon theologian and writer until his death.