I’ve added another batch of English translations of “past masters” to this site. See the new page Turmel/Delafosse works translated into English. It’s listed with others in the right margin of this blog.
Joseph Turmel was brought to my attention by Roger Parvus a decade ago. Parvus engages with Turmel’s thoughts and offers his own modifications. See especially his series on a case for Simonian origins of Christianity (another static link in the right margin). His study of the Ignatian letters also engages with Turmel’s thoughts.
Turmel was one of the radical thinkers in the time of Alfred Loisy, Charles Guignebert, Paul-Louis Couchoud, . . . Like Loisy, he was a Catholic priest, but unlike Loisy, he stayed undercover for quite some time publishing under a pseudonym (= Henri Delafosse).