After the execution of Charles I., Jan. 30, 1649, it became more than ever necessary for all thoughtful men to express their convictions. For a people to put to death its king by judicial process was an unheard of event. Those who considered that the Parliament had acted within the law and could not have done otherwise with due regard to the welfare of the nation had to convince doubting and timid citizens at home, and also, so far as was possible, to placate critics in other nations who still believed that the king could do no wrong; for all Europe interested itself in this tremendous act of the English Parliament. Within a fortnight after the death of the king, Milton published his pamphlet on The Tenure of Kings and Magistrates. This work so impressed the parliamentary leaders as a thorough and unanswerable argument in defence of their cause that they sought out its author, and in March appointed him to the important post of Secretary for Foreign Tongues. Milton's perfect command of Latin now stood him in good stead. Here was an uncompromising puritan, fully the equal of the foreign ecclesiastics in theology, and capable of holding his own in Latin composition with the most famous humanists of the time. Latin was then the language of international intercourse. Milton's duty was to translate into and from Latin the despatches that passed between his own and foreign governments. He also composed original treatises, some in English and some in Latin, the most important of which continued his justification of the national act of regicide. The importance of these writings was very great. Milton's services to the puritan cause can to-day hardly be appreciated. It was the constant aim of royalists at home and abroad to represent England as having fallen under the control of ignorant fanatics, of ambitious, barbarous, blood-thirsty men. By his very personality, his knowledge of affairs, his familiarity with ancient and mediaeval history, and, above all, by his fluency in Latin invective, Milton thwarted attempts to disparage his countrymen as lawless barbarians. He helped to maintain the good name of his country as a land of intellectual light and of respect for ancient usage. Foreigners who attempted personal vilification found him ready to meet them with their own weapons. The poet of Comus now shows himself a controversialist of unbounded energy. In 1652, shortly before the death of his wife, Milton became totally blind. Henceforward the duties of his secretaryship had to be performed with the aid of an amanuensis. He continued, however, to fill the office till just before the end of the Protectorate in 1659. In November, 1656, he married Katharine Woodcocke, who lived but till March, 1658. She left an infant which died a month after the mother.