Kilkenny. He received a substantial grant of land in south County Dublin "for his good service against the Irish of Leinster and for his constant loyalty". D'Artois was not especially grateful for this reward, and made the celebrated complaint about his new estate that: "it would be worth more than a thousand marks a year if it were near London, but I have such trouble keeping it that I would not wish to live here for long, for a quarter of the whole land of Ireland". He also complained of his difficulty in gaining possession of the lands granted to him. He laid claim to the manor of Huntspill Marreys in Somerset, but the King upheld the rival claim of James Butler, 3rd Earl of Ormond. In 1397 the King ordered payment to him, jointly with Robert de Faryngton (shortly afterwards to be Lord Treasurer of Ireland), in respect of the marriages of the three daughters of Robert Ufford - Ela, Sybilla and Joan - by his wife Eleanor Felton, daughter of Sir Thomas Felton, who were royal wards. Sybilla became a nun; her sisters married into the Bowett family. In 1398, when Roger Mortimer, 4th Earl of March, the Lord Lieutenant of Ireland, was killed in a skirmish with the O'Brien clan at Kells, County Meath, d'Artois was put in charge of taking reprisals against the O'Briens. It was reported that he "slew, captured or brought into submission many of the Irish". His service with the House of Lancaster He accompanied Richard II on his ill-fated return to England in 1399, and as Richard's enemies moved to depose him, Jenico, who was known to be one of the King's staunchest supporters, was arrested at Chester. After Richard's forced abdication, and his death early in 1400, given Jenico's record of loyalty to the late King the new regime might have been expected to result in his being executed out of hand, which was the fate of several of Richard's closest advisers. D'Artois did not help his case by stubbornly continuing to wear Richard's livery (insignia). However, he had several influential friends in the new regime who pleaded for clemency on his behalf. The new King Henry IV clearly valued Jenico for his military ability (they had, of course, served together with the Teutonic Knights in Lithuania). His loyalty to Richard was not held against him, and he received a royal