Before "deism" came into English vogue, the names for unbelief, even deistic, were simply "infidelity" and "atheism"--e.g., Bishop Fotherby's Atheomastix (1622), Baxter's Unreasonableness of Infidelity (1655) and Reasons of the Christian Religion (1667), passim. Bishop Stillingfleet's Letter to a Deist (1677) appears to be the first published attack on deism by name. His Origines Sacræ (1662) deals chiefly with deistic views, but calls unbelievers in general "atheists." Cudworth, in his True Intellectual System of the Universe (written 1671, published 1678), does not speak of deism, attacking only atheism, and was himself suspected of Socinianism. W. Sherlock, in his Practical Discourse of Religious Assemblies (2nd ed., 1682), attacks "atheists and infidels," but says nothing of "deists." That term, first coined, as we have seen, in French, seems first to have found common currency in France--e.g., on the title-pages of the apologetic works of Marin Mersenne, 1623 and 1624. The term "atheist" was often applied at random at this period; but atheism did exist. When the orthodox Boyle pushed criticism in physical science under such a title as The Sceptical Chemist, the principle could not well be withheld from application to religion; and it lay in the nature of the case that the name "freethinker," like that of "skeptic," should come to attach itself specially to those who doubted where doubt was most resented and most resisted. At length the former term became specific.