sentences:  His wife was co-heiress in 1324 to her uncle, Aymer de Valence, knt., Earl of Pembroke, by which she inherited the manor and castle of Mitford, the manor of Ponteland, and lands in Little Eland, Northumberland, and the manor of Foston (in Foston-on-the-Wolds), Yorkshire.In 1325 he was commander of the English troops in Gascony.Strathbogie married Joan, elder daughter of Sir John III Comyn, Lord of Badenoch, Joint Guardian of Scotland, by his spouse Joan (1292–1326), daughter of Sir William de Valance, Knt., Lord of Pembroke, Valence, Montignac, Bellac, etc., uterine brother of King Henry III of England.