‘You seem to know a good deal, M. de Sarthe,’ he said sullenly. ‘Surely you must know that I am not in the secrets of our Foreign Office.’

‘I believe that, of course, if you say so, sir. But I believe as well that the Tsar did not draw up this document without your encouragement, and that in encouraging the Tsar, you acted as the instrument of the Council of State. I am entitled to suppose that you were not a blind instrument, but that you knew pretty well why the Council were so ready to fall in with the enthusiastic impulses of Nicholas II.’

It was a bold thrust, but it went home. The Grand Duke gave me a startled look, and relapsed into a long spell of silent pondering. Finally he said—

‘And supposing I were to tell you something that you considered it worth a million roubles to hear, what guarantee have I that you would not betray my secret? What proof have I even now that you are not a spy set on by my enemies in the Council of State?’

‘I will give your Highness that proof on condition that, if it is satisfactory, you will accept my proposal.’

‘I consent.’

‘Then all I need do is to invite you to make your communication, not to me but to the Ambassador of the Sublime Porte, whom you will hardly suspect of being in the confidence of M. Pobiedonostzeff.’

With these words I rose to my feet. Stupefied for a moment, the Grand Duke recovered himself in time to make a detaining gesture.

‘Do not go, monsieur. What you have said completely satisfies me. It appears that I am required to betray my country.’

‘That depends,’ I returned smoothly. ‘If the Council of State is plotting to betray the Tsar, as I understand it is, I should have thought it consistent with the honour of a Russian prince of the blood to take part in defeating their unworthy schemes.’