I was moved to investigate the subject of this study by an admiration of long standing for John Wyclif, and by the feeling that James Gairdner, the latest historian of Lollardy, had done scant justice to the religious movement that began with Wyclif, and that survived through a century and a half to lend powerful aid to Henry VIII, when the hour struck for the rejection of the Roman jurisdiction. When the work was finished, I found myself at a goal not far removed from that of Dr. Gairdner, although I had reached it with less reluctant feet. Dr. Gairdner had the spirit of the true archivist.1 He had no aversion to dust; he could endure even dirt; but disorder, never. And Lollardy, in English society in the fifteenth and early sixteenth centuries, was a source of disorder. I do not revolt at disorder when great changes are necessary. Unlike Dr. Gairdner, I can find great uses for the man who “refused to recant or bow to the opinion of trained judges,” even though they “presumably understood such questions better than himself.” I cannot view the literature of Lollardy, admittedly crude, as “poisonous.” And I respectfully dissent from the view that an admission of the right of sects to exist is “fatal to the essence of Christianity itself.” But I have found ever increasing reason to concur in the conclusion to which Dr. Gairdner's unrivalled knowledge led him, viz., that Lollardy survived through the troubled days of the fifteenth century to “help Henry VIII put down the Pope,” that Henry's reformation of the Church was “precisely on Lollard lines,” and that “Lollardy affected the Church more and more after his death.”