Just found this G. Edward Griffin piece that is more accurate about the 1890-1920 British period. He cites Quigley a lot, but also adds The Pilgrims Society (without mentioning Quigley’s omissions.)

Editor. (May 21, 2015). G. Edward Griffin, ref. Pilgrims Society, Society of the Elect. Para-Political Journal. Source: https://parapoliticaljournal.com/tag/g-edward-griffin/