There was nothing else for it – we had to arrest Geng Wenbo. The evidence was now piling up against him. The existence of the incriminating play script in the Geng household could have been said to be circumstantial on its own. And the ‘testimony’ of Nu within it was sketchy to say the least. But put together with Sun’s evidence, it all added up to a very sound case against the boy. It was in fact a much stronger set of facts than those which the prefect had lined up against Jianxu. Of course, Li Wen-Tao would be our major stumbling block, and Lin recognized that. ‘What are we going to do about Li? He will seek to undermine our case when we present it to Taitemir, the Mongol governor.’ I gave a short, barking laugh. ‘Don’t you worry about Li. His authority is compromised totally. I have evidence he has been running an illegal scam involving burglary and payment for the return of the stolen goods.’ Lin looked shocked, his face turning pale. ‘How do you know this?’ ‘Because I set up the scam, and then Li took it over.