Trowbridge, W.R.H.  "Cagliostro".  Chapman & Hall,, 1910, 312pp., illustrated, including a picture of Weishaupt..  Extremely important but sympathetic study Joseph Balsamo, a  Cabalist who as a member of Weisthaupt's Illuminati orchestrated the "Diamond Necklace Affair" which helped cause the French Revolution.  Trowbridge's account makes copious reference to Weisthaupt & the Illuminati, thus establishing the credibility of those who warned of its dangers.  Very good copy, some foxing