Dictionary of National Biography, 1885-1900/Erskine, James (d.1640)
ERSKINE, JAMES, sixth Earl of Buchan (d. 1640), was the eldest son of John, second or seventh earl of Mar [q. v.], by his second wife, Lady Margaret Stuart, daughter of Esme, duke of Lennox. He married Mary Douglas, countess of Buchan, daughter and heiress of James, fifth earl of Buchan, and assumed the title of Earl of Buchan. This title was confirmed to him by a royal charter, dated 22 March 1617, the countess resigning her rights in his favour, and he was allowed the possession and exercise of all honours, dignities, and precedence of former earls of Buchan. A decree of the court of sessions, 25 July 1628, restored to Buchan and his wife the precedency over the earls of Eglinton, Montrose, Cassilis, Caithness, and Glencairn, which had been claimed by them, and granted by a former decree in 1606. On the accession of Charles I, Buchan became one of the lords of the bedchamber. He lived chiefly in London, where he died in 1640. He was buried at Auchterhouse, Forfarshire. His wife died before him in 1628. They left six children, two sons, James, who succeeded to the title, and John, and four daughters.
[Douglas and Wood's Peerage of Scotland.]