This thesis proposes a correlation between the twenty-four Canterbury Tales and an external ordered system, namely the twelve signs of the zodiac, from which one might infer Chaucer's intended ordering of the Tales. While it is generally acknowledged that the Tales contain much astrological material, the radical suggestion here is that Chaucer wrote them as a means of fulfilling his intention, expressed in A Treatise on the Astrolabe, to write a fifth part of that Treatise, in which be would explain to his ten-year old son, Lewys, the principles of astrology. The zodiac comprises twelve signs expressed as six binary oppositions throughout nature. In creating the Canterbury Tales, the thesis claims, Chaucer employed in each Tale two of those...