Indeed Gwyn, the Roman tale of Cimon and his daughter Pero. I was intrigued however that a late 18th century visitor called the plaque a depiction of ‘the Grecian Daughter’. I discovered that Arthur Murphy wrote a drama of that name which premiered at Drury Lane in 1772. In the play Evander, deposed and incarcerated King of Syracuse, is fed by his daughter Euphrasia. The play was a success and in a later production at Covent Garden Mrs Siddons played the role of the daughter. Engravings and ceramics were produced based on the play. Hence the visitor recognising the plaque as ‘Greek’ rather than “Roman’.