Answers on a postcard, to arrive by Monday 1 March: DETAILS 421, IoS, 1 Canada Square, London E14 5DL. Three winners will each receive a bottle of champagne
Details 419 came from William Hogarth's The Lady's Last Stake - also known as Piquet or Virtue in Danger (1758-9). It was his last "modern moral subject", and untypically straightforward. One of the perks of doing contemporary life dilemma-scenes was that you could leave quite a lot in the air. But this picture was pegged to a current play of the same name - and so how the gambling lady got into the fix (blamelessly), and if she'll get out of it (yes, by a squeak), are closed questions. The gripping hand is the most gripping bit. It's in the Albright-Knox Art Gallery, Buffalo, New York.
The first three correct entries came from: M Taylor, Kingston upon Hull; J Faulkner, Eydon; M Copp, Sudbury