Half an hour later French was mounting the stairs of the Hatton Garden office. With a face wreathed in smiles, Billy Newton ushered him into the private office. Mr. Duke seemed nervous and a trifle excited as he shook hands. “The more I think over this affair, Inspector, the less I like it,” he began immediately. “I do hope there is nothing wrong. I will tell you all I know, but before I show you Schoofs’ letter I had better explain how it came to be written.” He looked up interrogatively, then as French nodded, continued: “As I think I already mentioned, Vanderkemp is my travelling agent. He attends sales and auctions in all the countries of Europe. He has carried through some very large deals for me, and I have every confidence both in his business acumen and in his integrity. I told you also that amongst others he had purchased and brought to London the greater part of the missing stones.” “You told me that, sir.” “Of late years, when Vanderkemp is not on the road, he has been working in the Amsterdam branch. Some three or four days before poor Gething’s death he had returned from a tour through southern Germany where he had been buying jewels from some of the former nobility who had fallen on evil days since the revolution. Three days ago, on last Monday to be exact, I learnt that a very famous collection of jewels was shortly to be sold in Florence, and I wrote that evening to Schoofs telling him to send Vanderkemp to Italy to inspect and value the stones with a view to my purchasing some of them. This is Schoofs’ reply which I received this morning. You see what he says: ‘I note your instructions re sending Vanderkemp to Florence, but he had not yet returned here from London, where I presumed he was staying with your knowledge and by your orders. When he arrives I shall send him on at once.’ What do you make of that, Inspector?” “Vanderkemp did not come to London, then?” “Not to my knowledge. He certainly did not come here.” “I should like to know why Mr. Schoofs thought he had, and also the date he was supposed to start.” “We can learn that by wiring to Schoofs.” Inspector French remained silent for a few moments. It seemed to him now that he had neglected this Dutch office. It was at least another line of inquiry, and one which might easily bear fruitful results.