"Or possibly," Lutchester suggested, "that he has done what certainly seems the most reasonable thing--gone straight off to the War Office with his formula and forgotten all about us. Let us return the compliment and forget all about him." They finished their luncheon a little more cheerfully. As the cigarettes were handed round, Pamela's eyes looked longingly at a tray of Turkish coffee which was passing. "I'm a rotten host," Holderness declared, "but, to tell you the truth, this queer prank of Sandy's has driven everything else out of my mind. Here, Hassan!" The coloured man in gorgeous oriental livery turned at once with a smile. He approached the table, bowing to each of them in turn. Pamela watched him intently, and, as his eyes met hers, Hassan's hands began to shake. "The waiter is bringing us ordinary coffee," Holderness explained. "Please countermand it and bring us Turkish coffee for four." The man had lost his savoir faire. His wonderful smile had turned into something sickly, his bland speech of thanks into a mumble. He turned away almost sheepishly. "Hassan doesn't seem to like us to-day," Molly remarked. "I should have said that he was drunk," her brother observed, looking after him curiously. There was certainly something the matter with Hassan, for it was at least a quarter of an hour before he reappeared and served his specially prepared concoction with the usual ceremony but with more restraint. Molly and the two men, after Hassan had sprinkled the contents of his mysterious little flask into their coffee, gave him their hands for the customary salute. When he came to Pamela he hesitated. She shook her head and he fell back, bowing respectfully, his hand tracing cabalistic signs across his heart. For a moment before he departed, he raised his eyes and glanced at her. It was like the mute appeal of some hurt or frightened animal. "You don't approve of Hassan's little ceremony?" Lutchester asked her. She shrugged her shoulders. "In America," she observed, "I think we look upon coloured people of any sort a little differently. Well, we've certainly given your friend a chance," she went on, glancing at the little jewelled watch upon her wrist, "We've outstayed almost every one here." Their host paid the bill, and they strolled reluctantly towards the door, Holderness and Pamela a few steps behind. "Now what are your sister and Mr. Lutchester studying again?" the latter inquired, as they reached the lobby. Molly had paused once more before the notice on the wall, which seemed somehow to have fascinated her. She read it out, lingering on every word: MEFIEZ-VOUS! TAISEZ-VOUS! LES OREILLES ENNEMIES VOUS ECOUTENT! Holderness listened with a frown. Then he turned suddenly to Lutchester, who was standing by his side. "It would be too ridiculous, wouldn't it--you couldn't in any way connect the idea behind that notice with Sandy's disappearance?"