'Suddently, at about one o'clock in the morning, there was a sharp, unbearably explicit knock on the door. 'They've come for Osip', I said'. In 1933 the poet Osip Mandelstam- friend to Boris Pasternak and Anna Akhmatova- wrote a spirited satire denouncing Josef Stalin. It proved to be a sixteen-line death sentence. For his one act of defiance he was arrested by the Cheka, the secret police, interrogated, exiled and eventually re-arrested. He died en route to one of Stalin's labour camps. His wife, Nadezhda (1899-1980) was with him on both occasions when he was arrested, and she loyally accompanied him into exile in the Urals, where he wrote his last great poems. Although his mind had been unbalanced by his ordeal in prison, his spirit remained unbroken. Eager to solve 'the Mandelstam problem', the Soviet authorities invited the couple to stay in a rest home near Moscow. Nadezhda saw it as an opportunity for her husband to mend his shattered life, but it was a trap and he was arrested