THE CENTRAL terms of Book V, around which turn the many episodes and themes of the book, are justice, equity, and mercy. These terms are associated with Artegall, the knight of justice, at important stages of his quest: he is initially introduced not only as the ‘instrument’ of ‘iustice’ (V.proem.11), but as the pupil of the goddess Astraea, who has trained him ‘to weigh both right and wrong / In equall balance’ and ‘equitie to measure out along / According to the line of conscience’ (V.i.7). He is later known to Guyon as ‘our judge of equity’, and is rescued from Radigund's captivity by Britomart, who has herself recently visited the temple of the goddess Isis, ‘that part of Iustice, which is Equity’ (V.vii.3).