This, the fourth volume in the series of Ancillary Publications to the Royal Irish Academy's Dictionary of Medieval Latin from Celtic Sources, reprints the definitive edition of two of the most significant works in the corpus of Celtic-Latin literature. The ever fascinating questions concerning the life, personality and achievements of St Patrick have come to constitute a field of study in their own right, and scholars working on these matters must naturally turn to his own writings-the Confessio and the Epistola ad milites Corotici- for their primary evidence. But it also the case that...