John Larsen in 1899 writes that Brigham taught the "Adam-God" doctrine.
John Larsen, Mormonism Refuted in Light of Scripture and History: A Testimony to the Historical Church (San Francisco: Protestant Publishing House, 1899), 25-26
The representatives of Mormonism, for instanee, boldly claim that in the celestial kingdom the exalted shall be kings in a family of many wives; caring noting for the teaching of the Scriptures, that there shall be no marriage in heaven. They boldly claim (as was developed in the teachings of Joseph Morris) that there are millions of Gods, related by intermarriage, and that at present there are men upon the earth who are saviors older and greater than Jesus ("Spirit Prevails," page 10). This doctrine rests in the deification of Adam by Brigham Young. These and many other blasphemies the Christian Church refutes and protests against to-day, as ever, in the power and light of the Holy Spirit, defending the simple, the saving faith—the worship in spirit and in truth—as taught by the Savior himself. The day that the Christian Church fails to take a stand against such perversions, it may justly be accused of having lost the spirit of inspiration and truth. At present, it is Mormonism that stands accused along with its pantheistic allies,—accused of attempting to convert the Christian world into a materialism and empty forms.