Le Fevre was an able chemist and a lucid, learned, and accurate author. He wrote:
*Traité de la Chymie: A Compendious Body of Chymistry: Wherein is contained whatsoever is necessary for the attaining to the curious knowledge of this Art; Comprehending in general the whole practice thereof: and teaching the most exact preparation of Animals, Vegetables and Minerals, so as to preserve their essential Vertues. Laid open in two Books, and dedicated to the use of all Apothecaries, &c. (2 volumes, 1664 - English translation).
*Disputatio de Myrrhata Potione (in volume ix. of John Pearsons Critici Sacri' (1660).
*A Discourse upon Sr. Walter Rawleigh’s Great Cordial (1664).