He was also a founding member and vice-president of the Anglo-German Association in 1928 which promoted pro-German sentiment in Britain.
This had the effect of drumming up pro-German sentiment among a population of Afrikaners.
The Committee was originally concerned with investigating pro-German sentiments in the American liquor industry.
Still, as a young adult reading Hitler's Mein Kampf, she sympathized with, and felt excited by, the pro-German sentiment, while glossing over the anti-Semitism.
In the 1930's, however, Cliveden became notorious as a reputed center of pro-German sentiment.
Nonetheless, he continued to send Hitler encouraging reports about the strength of pro-German sentiment among the British aristocracy.
At some point in 1917 he was recalled to Washington in connection with an Army Intelligence investigation of pro-German sentiments.