7th century. The Irish Saint Muirchu wrote a vita of Saint Brigid and
another of Saint Patrick St Patrick's Life is included in the Book of
Armagh and Muirchu Maccu Machteni wrote it at the request of Aed,
Bishop of Sletty.
Although St. Muirchu has only a brief note in today's Lives he has a
very important place in Irish hagiography because of his
writings.
(Benedictines,
Encyclopaedia).