 Book VI is centred on the virtue of Courtesy as embodied in Sir Calidore.A letter written by Spenser to Sir Walter Raleigh in 1590 contains a preface for "The Faerie Queene", in which Spenser describes the allegorical presentation of virtues through Arthurian knights in the mythical "Faerieland".Presented as a preface to the epic in most published editions, this letter outlines plans for twenty-four books