There is still one of which you never speak.' Marco Polo...

There is still one of which you never speak.' Marco Polo bowed his head. 'Venice,' the Khan said. Marco smiled. 'What else do you believe I have been talking to you about?' The emperor did not turn a hair. 'And yet I have never heard you mention that name.' And Polo said: 'Every time I describe a city I am saying something about Venice.