Opera medica omnia. 4 vols.

De Baillou, “the first epidemiologist of modern times”, foreshadowed much that was afterwards taught by Sydenham. He first described whooping-cough and is often credit with introducing the term “rheumatism”. Baillou was Court physician during the reign of Henri IV of France. See the article on Baillou by E. W. Goodall in Annals of Medical History, 1935, 7, 409-27. (According to Webb Dordick, the antiquarian bookseller Emil Offenbacher pointed out in his catalogue 28, item 94, a use of the word rheumatism as early as 1577: Petrus Pichotus. De rheumatismo . . . , Bordeaux, 1577.)