[1] His closest friend at Rugby and throughout his life was his cousin, William Henry Waddington, later in French politics.
His theological views underwent considerable change; the position which Shirley occupied at the time of his death was still a provisional one.
In 1862 he edited for the Rolls Series ‘Royal and other Historical Letters illustrative of the Reign of Henry III.’ He also published a lecture on ‘Scholasticism,’ delivered before the university of Oxford, 1866.
After his death a small volume by him, entitled ‘Some Account of the Church in the Apostolic Age,’ was published by the Clarendon Press.
By his wife Philippa, daughter of Samuel Knight of Impington, Cambridgeshire, whom he married on 4 July 1855, Shirley had five children:[3]