 Each order is stated to have lasted for the reigns of four kings - symmetry is attained by omitting about six intervening reigns, but the outside dates of each period are clear enough, and the document relates customs of the Divine Office and the Easter and tonsure questions.The first order was in the time of St. Patrick, from the reign of Laoghaire to that of Túathal Máelgarb (c. 440-544).They were all bishops, 350 in number, founders of churches, all Romans, French (i.e.