"Von Hantzauel," Thomson explained, "followed in the footsteps of his illustrious chief. He was a collector of such trifles as jewellery, money, and all manner of _objets d'arts_ of a small and portable character. With the aid of a German smith whom he sent for when in residence at Brussels, he constructed a very ingenious hiding place in the chateau for his loot. When the reversal of fortunes came, he was one of those pig-headed, obstinate asses who refused to believe in what was coming, and he only escaped from Brussels by a miracle. Since then he has used every argument to persuade the Baroness to bring his little collection over the frontier to Holland. The Baroness played with him as a cat might with a mouse. She declared that his hiding place was so ingenious that even with the plan he had sent her she had failed to discover it. Then she reminded him of the past and declared that the treasure should not leave her house without a visit from him. Finally, as you know, she succeeded. The visit was arranged for. The whole affair called for a certain amount of diplomacy. The direct intervention of the Belgian police would have meant the arrest of von Hantzauel on the frontier. The affair had to be managed differently. The Baroness is an old friend of mine and she sought my aid." "In what capacity?" I asked quickly. "And what has become of the treasure?" Mr. Thomson smiled vaguely. He listened for a moment to the bump of the sea against the portholes. Then he filled our glasses. "An answer to those questions just now is scarcely possible," he replied. "We will call them, if you please, Conundrum Number Three." CONUNDRUM NUMBER FOUR THE COURTSHIP OF NAIDA