A general and heraldic dictionary of the peerages of England, Ireland, and Scotland, extinct, dormant, and in abeyance. England by John Burke
"Richard de Grey, second baron, summoned to parliament from 4th March, 1309 to 3d February, 1335. This nobleman was seneschal of Gascony in the 6th Edward II. In the 12th of the same reign he was in the Wars of Scotland, and again the next year, when he was in the retinue of Thomas of Brotherton, Earl of Norfolk. In four years after, he was constituted steward of the duchy of Aquitaine, and within two years appointed constable of Nottingham Castle. In the 7th of Edward III., he has summons to attend the king at Newcastle, with horse and arms, to march against the Scots, but had a special dispensation from the service in consequence of his bodily infirmities."