there is a life of mac creiche, the "betha meic creiche". it is written in middle irish, and probably dates from the 11th or 12th century. the surviving manuscript was copied in 1634 from an earlier manuscript of 1528. mac creiche is mentioned in accounts of columba of terryglass, ailbe of emly and enda of aran. he is the subject of a quatrain in a poem said to be written by cuimmín of conor about the irish saints.