The reclusive pensioner behind the secret trove of paintings worth nearly £1billion, seized by the Nazis in the 1930s, and revealed this weekend, was a man of mystery in many aspects of his life. Cornelius Gurlitt, 80, son of art dealer Hildebrand Gurlitt, did not have an official bank account, pension or insurance - he simply lived off the extensive collection, selling them when his money dipped. The pensioner, who had never worked, was not even registered with the police - mandatory in Germany - and was not known to the tax authorities or social services. The story which begins...