Geoffrey Chaucer was an English author. He once presented the Doctor with a copy of his "The Doctour of Science's Tale". (PROSE: Cat's Cradle: Time's Crucible) He and the Doctor went carousing in the Tabard in Southwark over mugs of ale. (PROSE: Synthespians™)
In 1400, Chaucer was involved in a plot to assassinate Henry IV and restore Richard II to the English throne, though he learned later that Richard was already dead. His son Tom, who worked as Henry IV's butler, was one of his co-conspirators. At this time, he met the First Doctor, Ian Chesterton, Barbara and Vicki Pallister. He described the Doctor as "a man of rare wit and temper, a philosopher."