Leprosy is supposed to have had its origin in Egypt: the laws laid down in the Book of Leviticus for the separation of lepers are stringent and precise: it was believed, partly, no doubt, on account of these statutes in the Book of the Jewish Law, that the disease was brought into Western Europe by the Crusaders; but this was erroneous, because it was in this country before the Crusaders. Thus the Palace of St. James stands upon the site of a lazar house founded before the Conquest for fourteen leprous maidens.