If it is genuine the earliest life of Patrick ever written would probably be the brief metrical life ascribed to Fiacc of Sletty, the sixth or seventh in descent from Cáthaoir [Cauheer] Mór, who was king of Leinster at the close of the second century.[33] His mother was a sister of Dubhthach's [Duv-hach], the chief poet and Brehon of Ireland, who, we are told, helped St. Patrick to review and revise the Brehon Laws. Fiacc was a youthful poet in Dubhthach's train at Tara. Afterwards he was tonsured by St. Patrick, became Bishop of Sletty, and on Patrick's death is said to have written his life, and not forgetful of his former training, to have written it in elaborate verse.[34] So famous a critic as Zimmer believed half the poem to be genuine, but Thurneysen rejects it because it does not fall in with his theories of Irish metre.[35] But the longest and most important life of St. Patrick is that known as the Tripartite, or Triply-divided Life, which is really a series of three semi-historical homilies, or discourses, which were probably delivered in honour of the saint on the three festival days devoted to his memory, that is, the Vigil, the Feast itself, on March 17th, and the day after, or else the Octave. This Tripartite life, which is a fairly complete one, is written in ancient Irish, with many passages of Latin interspersed. The monk Jocelin, who wrote a life of the saint in the twelfth century, tells us that St. Evin[36]--from whom Monasterevin, in Queen's County, is called, a saint of the early sixth century--wrote a life of Patrick partly in Latin and partly in Gaelic, and Colgan, the learned Franciscan who translated the Tripartite in his "Trias Thaumaturga,"[37] believed that this was the very life which St. Evin wrote. Colgan found the Tripartite life in three very ancient Gaelic MSS., procured for him, no doubt, by the unwearied research of Brother Michael O'Clery in the early part of the seventeenth century, which he collated one with the other, and of which he gives the following noteworthy account:--