J. R. and Philip Milton present the first critical edition of John Locke's Essay concerning Toleration, based on all extant manuscripts, and a number of other writings on law and politics composed between 1667 and 1683. Although Locke never published any of these works himself they are of very great interest for students of his intellectual development because they are markedly different from the early works he wrote while at Oxford and show him working out ideas that were to appear in his mature political writings, the Two Treatises of Government and the Epistola de Tolerantia. With authoritative contextual guidance from the editors, this will be an invaluable resource for all historians of early modern philosophy, of legal, political, and religious thought, and of 17th-century Britain.