Arriving in London, Lord Castlehaven followed the king to Berwick, where he found the royal army encamped, with the Tweed before it, and the Scotch, under Gen. Leslie, lying at some distance. A pacification was soon effected, and both armies partially disbanded. After this the earl passed his time “as well as he could” at home till 1640. In that year the King of France besieged Arras, and Lord Castlehaven set out to witness the siege. Within was a stout garrison under Owen Roe O’Neal, commanding for the Prince Cardinal, Governor of the Low Countries. This was the first meeting of Castlehaven with the future victor of Benburb, with whom he was afterwards brought into closer relations in the Irish Rebellion. The French pressed Arras close, and the confederates being defeated, and the hope of the siege being raised grown desperate, the town was surrendered on honorable terms. This action over, Lord Castlehaven returned to England and sat in Parliament till the attainder of the Earl of Strafford. When that great nobleman fell, deserted by his wavering royal master, and the king’s friends were beginning to turn about--they scarce knew whither--to prepare for the storm that all men saw was coming, Lord Castlehaven went to Ireland, where he had some estate and three married sisters. While there the Rebellion of 1641 broke out. Although innocent of any complicity in the outbreak, his faith made him suspected, and he was imprisoned on a slight pretext by the lords-justices. Escaping, his first design was to get into France, and thence to England to join the king at York, and petition for a trial by his peers. But coming to Kilkenny, he found there the Supreme Council of the Confederate Catholics just assembled--many of them being of his acquaintance--and was persuaded by them to throw in his lot with theirs, seeing, as they truly told him, that they were all persecuted on the same score, and ruined so that they had nothing more to lose but their lives. From that time till the peace of 1646 he was engaged in the war of the Confederate Catholics, holding important commands in the field under the Supreme Council. His _Memoirs_ is the history of this war.