Cannon states that Joseph taught that the seed of Cain could not receive the priesthood.
Historical Department journal history of the Church, 1830-2008; 1890-1899; 1895 August; Church History Library, August 22, 1895, p. 182.
At a regular meeting of the First Presidency and Apostles held in the Salt Lake Temple, August 22, 1895, the question of the Negro and the Priesthood came up for discussion and the following is taken from the minutes of that meeting:
"President (George Q.) Cannon remarked that the Prophet taught this doctrine: That the seed of Cain could not receive the Priesthood nor act in any of the offices of the Priesthood until the seed of Abel should come forward and take precedence over Cain's offspring."