The De Cougans eventually vacated Redwood, and the castle was granted to the O’Kennedy family in 1350. It was then that the other floors were added to the castle. The local branch of the O’Kennedy family were based in Lackeen Castle, approximately 3 miles south of here, and so they turned this castle over to their chief bardic family, the Mac Egans. The bardic families played a crucial role in medieval Ireland, serving Gaelic chieftains and English lords alike. They fulfilled many functions, including those of advisors, administrators, lawyers, musicians, poets, physicians and ambassadors. However, each individual family tended to specialise in just one or two specific areas of study. The Mac Egans of Redwood were experts in historical study and the practice of the ancient Irish Brehon law. Only seven families in medieval Ireland practised and studied this ancient legal system. Most of these served only one master, whilst the Mac Egans served at least thirteen lords and chieftains, giving them a virtual monopoly over medieval Irish law. They founded a school of history and law here at Redwood, and some of Ireland’s foremost medieval thinkers had close links to this centre. Michael O’Cleary led a team of historians which compiled the famous Annals of the Four Masters, an enormous and comprehensive text which gave an account of all recorded Irish history up until the early seventeenth century. Upon its completion, Michael O’Cleary brought the text to some of the most influential men in the country, including the Archbishop of Dublin and the Bishop of Tuam. However, the first approval he sought was from a Flann Mac Aoghain, one of his former teachers and the lord of Redwood Castle.