The maintenance of the conquest was in these years less the work of the King's Justices than of the great houses. Of these, two principally profited, by the untimely felling of that great tree which overshadowed all others in Leinster, the Marshals. The descendants of the eldest son of Maurice Fitzgerald clung to their Leinster possessions, while their equally vigorous cousins pushed their fortunes in Desmond. Maurice, grandson of Maurice, and second Baron of Offally, from the year 1229 to the year 1246, was three times Lord Justice. "He was a valiant Knight, a very pleasant man, and inferior to none in the kingdom," by Matthew Paris's account. He introduced the Franciscan and Dominican orders into Ireland, built many castles, churches, and abbeys at Youghal, at Sligo, at Armagh, at Maynooth, and in other places. In the year 1257, he was wounded in single combat by O'Donnell, Lord of Tyrconnell, near Sligo, and died soon after in the Franciscan habit in Youghal. He left his successor so powerful, that in the year 1264, there being a feud between the Geraldines and de Burghs, he seized the Lord Justice and the whole de Burgh party at a conference at Castledermot, and carried them to his own castles of Lea and Dunamase as prisoners. In 1272, on the accidental death of the Lord Justice Audley, by a fall from his horse, "the council" elected this the third Baron of Offally in his stead. The family of Butler were of slower growth, but of equal tenacity with the Geraldines. They first seem to have attached themselves to the Marshals, for whom they were indebted for their first holding in Kilkenny. At the Conference of Castledermot, Theobald Butler, the fourth in descent from the founder of the house, was numbered among the adherents of de Burgh, but a few years later we find him the ally of the Geraldines in the invasion of Thomond. In the year 1247, the title of Lord of Carrick had been conferred on him, which in 1315 was converted into Earl of Carrick, and this again into that of Ormond. The Butlers of this house, when they had attained their growth of power, became the hereditary rivals of the Kildare Geraldines, whose earldom dates from 1316, as that of Ormond does from 1328, and Desmond from 1329.