. >> vanessa voigt: i saw there cornelius gurlitt.s an... a man who is ill. he was afraid, and he... he didn't speak. >> safer: cornelius sat stunned as agents went through his apartment. did he say anything to you or to the agents from the government? >> voigt: no. he... he was really shocked of this situation, i think. in this apartment, there were no people for... for many, many years. i think there were perhaps an art dealer, but... but no one else. >> safer: did he seem to be sane? >> voigt: yeah, he was. >> safer: his cousin says, after cornelius' father died, he never allowed anyone into the apartment or his crumbling house in salzburg, austria, where he kept a collection of 238 works of art of immense value, like this painting by monet. >> gurlitt: he gave him the whole collection of... of these paintings as inheritance, right? for... so, to... to survive. so every time cornelius would run out of money, he sold one of these paintings. >> safer: almost overlooked among the cache was a small drawing of a piano player by the germ