Arthur Annesley, Viscount Valencia, who founded the families both of Anglesea and Altham, was one of the staunchest adherents of Charles II., and had a considerable hand in bringing about his restoration to the throne. Immediately after that event his efforts were rewarded by an English peerage--his title being Baron Annesley of Newport-Pagnel, in the county of Buckingham and Earl of Angelsea. Besides this honour he obtained the more substantial gift of large tracts of land in Ireland. The first peer had five sons. James Annesley, the eldest son, having married the daughter of the Earl of Rutland, and having been constituted heir of all his father's English real property, and a great part of his Irish estates, the old earl became desirous of establishing a second noble family in the sister kingdom, and succeeded in procuring the elevation of his second son Altham to the Irish peerage as Baron Altham of Altham, with remainder, on failure of male issue, to Richard his third son. Altham, Lord Altham, died without issue, and the title and estates accordingly devolved upon Richard, who, dying in 1701, left two sons, named respectively Arthur and Richard. The new peer, in 1706, espoused Mary Sheffield, a natural daughter of the Duke of Buckingham, against the wishes of his relatives. He lived with his wife in England for two or three years, but was at last obliged to flee to Ireland from his creditors, leaving Lady Altham behind him in the care of his mother and sisters. These ladies, who cordially hated her, set about ruining her reputation, and soon induced her weak and dissipated husband to sue for a divorce, but, as proof was not forthcoming, the case was dismissed. Thereupon his lordship showed a disposition to become reconciled to his wife, and she accordingly went over to Dublin in October 1713; and through the good offices of a friend a reconciliation was effected, and the re-united couple, after a temporary residence in Dublin, went to live at Lord Altham's country seat of Dunmain, in the county of Wexford. Here, in April or May 1715, Lady Altham bore a son, which was given to a peasant woman, named Joan Landy, to nurse. At first the young heir was suckled by this woman at the mansion, and afterwards at the cabin of her father, less than a mile from Dunmain. In order to make this residence a little more suitable for the child it was considerably improved externally and internally, and a coach road was constructed between it and Dunmain House, so that Lady Altham might be able frequently to visit her son.