Short answers, pulled from the story.
George Cavendish was an English biographer who served as a gentleman-usher to Cardinal Thomas Wolsey from about 1522 until 1530. He managed Wolsey's extravagant entertainments and maintained constant physical presence at the center of Tudor power before retiring to his estate in Glemsford, West Suffolk.
George Cavendish composed his biography Thomas Wolsey, Late Cardinall, his Lyffe and Deathe between the 1st of January 1554 and the 31st of December 1558. The text remained unpublished during his lifetime and circulated only in manuscript form until it appeared in print in 1641.
George Cavendish witnessed the divorce proceedings against Catherine of Aragon and the appearance of Anne Boleyn as a debutante at court in 1522. He recorded conversations and movements that no other contemporary chronicler witnessed with such intimacy, creating the most important single source for Wolsey's life.
The work was mistakenly attributed to George Cavendish's younger brother William, the owner of Chatsworth House, until Joseph Hunter proved in the nineteenth century that George was the true author. This error persisted until the genuine text derived from contemporary manuscripts was published in 1810.
George Cavendish appears as a minor but significant figure in Dame Hilary Mantel's novel Wolf Hall and was portrayed by Robert Wilfort in the television adaptation. Actor David Oakes also played him in David Starkey's 2009 documentary series Henry VIII: The Mind of a Tyrant.