Analysis of information sources in references of the Wikipedia article "Charles Higham (biographer)" in English language version.
Higham claimed she (Duchess of Windsor) was the mistress not only of Count Ciano, but also of Ribbentrop. He maintained that the Duchess's attractions included exotic sexual techniques that she had picked up on visits to the brothels of Peking, which allowed the Prince of Wales to make the best of his supposedly modest endowments. He set a tone for vilification later explored by other biographers.