J. R. Birkelund writes letter to The Japan Weekly Mail; states that Brigham and many modern LDS believe Adam is the God and Father of Jesus.
J. R. Birkelund, "The Mormons. To the Editor of the 'Japan Mail,'," 16, no.36 The Japan Weekly Mail (October 19, 1901): 416
The Mormon Church believes that Jesus Christ was a polygamist. The Mormon Church teaches that God is a polygamist; the natural father of all intelligent beings in heaven, earth and hell; that angels, men and devils are his off-spring by procreation, or natural generation; and that Adam is the father of Christ's human nature, as Brigham Young was the father of his children.
The following quotations from Mormon works are taken world for word . . .
5. "He" (Adam) "is our Father and our God, and the only God with whom we have to do. . . . When the virgin Mary conceived the child Jesus, the Father had begotten him in his own likeness. He was not begotten by the Holy Ghost. And who is the Father? he is the first of the human family."—Journal of Discourses, Vol. I, p. 50, sermon by Brigham Young.