The cold breath of the Communist secret police state blighted countless lives behind the Iron Curtain. But it also touched my own childhood in 1970s Oxford. Olgica, our Yugoslav lodger, had an exciting secret: Uncle Dušan. The poet Matthew Arnold described Oxford as "home of lost causes, and forsaken beliefs, and unpopular names, and impossible loyalties." In Dušan's case, this was partly right: his surname (like those of most east European émigrés) if not exactly unpopular, was certainly baffling to British eyes and ears. I recall him as a glum, shadowy figure, with plenty to be glum about. His cause seemed irretrievably lost. He was a hero in his own twilight world, but in post-war Yugoslavia, the authorities denounced anti-communists like him as criminals and traitors. Many perished in mass graves or in the torture cells of the secret police. Dušan was one of the lucky ones. He had escaped to Britain, to a humble job as a mechanic and life in Crotch Crescent, a drab street in Oxford's outskirts -- a sad comedown for someone who in pre-war Yugoslavia had been a high-flying young civil servant.