Microfilm edition of the Blenheim Papers comprise the papers of John Churchill, 1st Duke of Marlborough. His correspondence with his colleague and close friend, Lord Treasurer Godolphin, with other ministers and officials, and with diplomats and foreign powers across Europe, affords a comprehensive view of English politics and government in the first decade of the 18th century. The set also includes papers of his wife Sarah, Duchess of Marlborough, and his son-in-law, the 3rd Earl of Sunderland. CRL owns all three parts of the set