Jaucourt's (1704 - 1779) article on Quietism in the Encyclopedia of Diderot and d'Alembert (Vol 13 (1765). Mentions Molinos and Mme Guion but not George Fox in the article (but the Encyclopedia may have entries on these...haven't checked yet).
Jaucourt speculates that the Quietists may have been influenced by Brahmins from the Orient (but of course theire's no direct connection that we know of, except a convergence of universal experiences). He also attempts to make the connection to the early Gnostics considered as heretics by Jerome, but again there's no recognizable influence that modern scholars can point to. However, I might add that Jaucourt was an astute person with brilliant speculations, but with a complete misunderstanding of what Quietism was/is all about. On the Quietism of Molinos and Guion, he believed that it entailed an elimination of human passions, and says that regarding Molinos, "his ideas in spirituality were more worthy of pity than indignation". He alludes to other writers who have focused on the "complete indifferences" in the Quietist state of silence, and says that he and others have eloquently refuted the "false visions" of the Quietists, "which do not deserve compassion and which contain nothing but intelligible jargon". Finally, he concludes that the Quietists have "reduced all physical things to a type of nothingness that is to say of stillness" http://tinyurl.com/hdvvhmq http://tinyurl.com/hdvvhmq