“Very fond of Rex,” said Simon briefly.

“I know,” De Richleau nodded, “but our situations are so different. My life is one of leisure — in fact, now that old age is creeping upon me, and more and more pursuits become barred to a man of my years — I find it increasingly difficult to pass my time in an interesting and agreeable manner. You, on the contrary, as a young partner in a great financial house, have always to be on the end of the eternal telephone. You even grudge a single afternoon spent away from your office in the City. I had imagined that it would be quite impossible for you to get away.”

“Well, to tell you the truth, I was — er — thinking of taking a holiday — going down to Monte for a few days — might just as well go to Russia!”

De Richleau smiled rather grimly. “I fear that this will be a very different kind of holiday, my friend. However, we will not talk of that. It is some days since I received this letter, so I have already made certain inquiries and preparations.”

“Tell me,” said Simon, shortly.

“First I cabled to my old friend, the President of the Chesapeake Banking and Trust Corporation — Van Ryn the elder — for news of Rex. Let us go into the other room, and I will show you his reply.” As he spoke the Duke left the table and threw open the door for his guest.

“Yes, I’d like to see that — I’ll take my brandy with me, if you don’t mind.” Carrying his glass, Simon Aron led the way into the big library.

It was not so much the size or decoration which made this room in the Curzon Street flat so memorable for those who had been privileged to visit it, but the unique collection of rare and beautiful objects which it contained. A Tibetan Buddha seated upon the Lotus; bronze figurines from Ancient Greece. Beautifully chased rapiers of Toledo steel and Moorish pistols inlaid with turquoise and gold, Ikons from Holy Russia, set with semi-precious stones, and curiously carved ivories from the East. The walls were lined shoulder-high with books, but above them hung lovely old colour-prints, and a number of priceless historical documents and maps.

De Richleau went over to his desk and, taking a few flimsy sheets from a drawer, handed them silently to Aron.

Simon read out the contents of the cable: