Mills and Sellius originally proposed simply to translate articles from Chambers' Cyclopaedia into French. However, Mills's knowledge of French was inadequate, the publisher André Le Breton was extremely dissatisfied with Mills's work, and Le Breton eventually physically assaulted Mills. Mills took Le Breton to court, but the court decided that Mills's incompetence had warranted the attack. Le Breton replaced Mills with Denis Diderot.