The portrait "Vanessa" depicts Esther Vanhomrigh and a man that became dean of what cathedral?
Vanessa (Millais painting):  It is a fancy portrait depicting Jonathan Swift's close friend and correspondent Esther Vanhomrigh (1688-1723), who was known by that nickname, which Swift himself invented for her. Jonathan Swift: Jonathan Swift (30 November 1667 – 19 October 1745) was an Anglo-Irish satirist, essayist, political pamphleteer (first for the Whigs, then for the Tories), poet and cleric who became Dean of St Patrick's Cathedral, Dublin.
St Patrick's Cathedral, Dublin