South Africa mission president Evan P. Wright tells the First Presidency of the many member and leader challenges related to requirements of the priesthood ban.
Evan P. Wright "Letter to the First Presidency," in Evan Petit Wright, A History of the South African Mission, Volume 3, 1944–1970 ([Salt Lake City]: The Author, [1987), 438, 442-443
Because some members in South Africa haven't been able to trace their genealogy and receive blessings which result therefrom, they may feel that I want to hinder their progress. Of course nothing could be further from the truth. In the South African Mission we are badly in need of leadership through the priesthood, and I am most anxious to ordain men as fast as we possibly can. If we could have another fifty or hundred priesthood bearers in the mission our work would move forward more rapidly and successfully. . . .
The influx of colored people into England is going to result in much mixed blood, European and African, throughout the world. If a male member of the Church living in England were to marry a colored girl from South Africa, his sons or g[r]andsons might easily be ordained to the priesthood at a later date without any question being asked about genealogical lines. Apparently this is the only mission in the Church where it is necessary for a man to trace his genealogy to establish his eligibility for the priestoood. As a result, the members of the Church in this country feel that they are penalized.
No doubt during the millen[n]ium considerable adjustment will take place and the matter of priesthood for those who have Negroid blood will be attended to at that time. I have also ccnsidered that any one of us might have some blood of Cain in our veins if our genealogy were established back far enough. In view of the above I have wondered if it might be sufficient for members of the Church in South Africa to establish their lines for five or six generations and if colored blood wasn't found, to let such individuals be ordained to the priesthood and be given the benefit of the doubt in such matters.