Abstract
Galen in a celebrated passage remarks that there were three ‘choirs’, in early Greek medicine: the choirs of Cos, of Cnidus, and of Sicily. The word is vague and suggestive, and we do well to keep it so. If we look in the Hippocratic Corpus for schools of medical theory, with distinct sets of doctrine marked off clearly from the doctrines of rival schools, we shall be lucky indeed if we can find them, and, having found them, succeed in convincing others of their existence. But we shall find, now and again, an individual voice proclaiming itself from among its impersonal surroundings with clarity and vigour: some treatises in the collection have their author's personality stamped on them as distinctly as on a work of art