[David O. McKay]
... President [Hugh B.] Brown called attention to a request that had been received from a woman formerly married to a Negro, by whom she had two children. She later divorced the Negro and married a white man and wants to go to the Temple and have her children sealed to her and her present husband. We agreed that if otherwise worthy, the woman and her white husband could go to the Temple for their endowments and be sealed, but the children by the former marriage could not be sealed to them.
[David O. McKay diary, Apr. 14, 1965 as quoted in Anderson, Devery; The Development of LDS Temple Worship, 1846-2000: A Documentary History, http://amzn.to/TempleWorship]