That the direct source of Chaucer's Man of Law's Tale was a passage in the Anglo-Norman Chronicle of the fourteenth-century Dominican friar Nicholas Trivet was first pointed out by the Swedish scholar Bäckström in 1845. Since then, important studies by Edmund Brock, Emil Lücke, and John S. P. Tatlock have compared these two versions of the tale of Constance and drawn attention to some of the changes made by Chaucer. Thus it is now generally agreed that while he closely followed the French original for the main outlines of his plot, he skillfully condensed on the one hand, and on the other hand added many philosophical, humanizing, and imaginative passages to Trivet's conventional and lifeless story.