Art exhibitions are all about the money, nothing about the art, finds Griselda Heppel

Exquisite tenderness: Gainsborough's portrait of his daughters Two weeks ago I went to the Gainsborough’s Family Album exhibition at the National Portrait Gallery, and if you have nothing to do in the next 2 days I urge you to catch it before it closes. (A fat lot of use giving you so little notice, I know. Sorry.) If your only image of this marvellous 18th century painter is as a highly-skilled, flattering portraitist of wealthy aristocrats, you’ll be bowled over – as I was – by the exquisite tenderness, emotional depth and freshness he achieved in portrait after portrait of his two daughters, captured together at various stages of their lives. His love and fatherly protectiveness burst out of these paintings, making them some of the most beautiful and heartbreaking portraits ever painted. Gainsborough's cousin, the Reverend Henry Burroughs: This portrait may have been done 'to advertise the artist's skills to potential patrons in his cousin...