I'm not sure when Monsieur Maillebouis wrote this, but it is a valuable supplement to his three earlier works (1991, 1992, 1993) which I listed in the Bibliography of The Elusive Quest p.311.  In the same volume I have given a very brief account of the millenarian delusion of the Brethren evangelist Albert Dentan in 1844 (p.140) for which I was heavily dependent on Maillebouis's very thorough research.  Timothy Stunt.