Lubbock examines two Renaissance masters at the National Gallery this winter. It is Jacopo Bellini's drawing book from the British Museum, and behind it on two adjacent walls, angled themselves like an open book, are two paintings of the Presentation of Christ in the Temple. The one on the left is by Andrea Mantegna (1431-1506), Jacopo's son-in-law, that on the right by Jacopo's son, Giovanni Bellini (c.1433?-1516), Mantegna's brother- in-law. This coup de theatre announces the theme of the show: the lifetime relationship between the two brothers-in-law, never before featured in an exhibition, as well as Jacopo's influence upon both. It is also the first time since the mid-15th century that these two Presentations have been seen together. Their juxtaposition is fascinating.