Beneath an awning spread above the balcony of one of those modern elegant flats, which today characterize Heliopolis, the City of the Sun, site of perhaps the most ancient seat of learning in the known world, a party of four was gathered, awaiting the unique spectacle which is afforded when the sun's dying rays fade from the Libyan sands and the violet wonder of the afterglow conjures up old magical Egypt from the ashes of the desert.  
“Yes,” Monte Irvin was saying, “only a year ago; but, thank God, it seems more like ten! Merciful time effaces sadness but spares joy.”
 
He turned to his wife, whose flower-like face peeped out from a nest of white fur. Covertly he squeezed her hand, and was rewarded with a swift, half coquettish glance, in which he read trust and contentment. The dreadful ordeal through which she had passed had accomplished that which no physician in Europe could have hoped for, since no physician would have dared to adopt such drastic measures. Actuated by deliberate cruelty, and with the design of bringing about her death from apparently natural causes, the Kazmah group had deprived her of cocaine for so long a period that sanity, life itself, had barely survived; but for so long a period that, surviving, she had outlived the drug craving. Kazmah had cured her!
 
Monte Irvin turned to the tall fair girl who sat upon the arm of a cane rest-chair beside Rita.
 
“But nothing can ever efface the memory of all you have done for Rita, and for me,” he said, “nothing, Mrs. Seton.”
 
“Oh,” said Margaret, “my mind was away back, and that sounded—so odd.”
 
Seton Pasha, who occupied the lounge-chair upon the broad arm of which his wife was seated, looked up, smiling into the suddenly flushed face. They were but newly returned from their honeymoon, and had just taken possession of their home, for Seton was now stationed in Cairo. He flicked a cone of ash from his cheroot.
 
“It seems to me that we are all more or less indebted to one another,” he declared. “For instance, I might never have met you, Margaret, if I had not run into your cousin that eventful night at Princes; and Gray would not have been gazing abstractedly out of the doorway if Mrs. Irvin had joined him for dinner as arranged. One can trace almost every episode in life right back, and ultimately come—”
 
“To Kismet!” cried his wife, laughing merrily. “So before we begin dinner tonight—which is a night of reunion—I am going to propose a toast to Kismet!”
 
“Good!” said Seton, “we shall all drink it gladly. Eh, Irvin?”
 
“Gladly, indeed,” agreed Monte Irvin. “You know, Seton,” he continued, “we have been wandering, Rita and I; and ever since your wife handed her patient over to me as cured we have covered some territory. I don't know if you or Chief Inspector Kerry has been responsible, but the press accounts of the Kazmah affair have been scanty to baldness. One stray bit of news reached us—in Colorado, I think.”
 
“What was that, Mr. Irvin?” asked Margaret, leaning towards the speaker.
 
“It was about Mollie Gretna. Someone wrote and told me that she had eloped with a billiard marker—a married man with five children!”
 
Seton laughed heartily, and so did Margaret and Rita.
 
“Right!” cried Seton. “She did. When last heard of she was acting as barmaid in a Portsmouth tavern!”
 
But Monte Irvin did not laugh.
 
“Poor, foolish girl!” he said gravely. “Her life might have been so different—so useful and happy.”
 
“I agree,” replied Seton, “if she had had a husband like Kerry.”
 
“Oh, please don't!” said Margaret. “I almost fell in love with Chief Inspector Kerry myself.”
 
“A grand fellow!” declared her husband warmly. “The Kazmah inquiry was the triumph of his career.”
 
Monte Irvin turned to him.
 
“You did your bit, Seton,” he said quietly. “The last words Inspector Kerry spoke to me before I left England were in the nature of a splendid tribute to yourself, but I will spare your blushes.”
 
“Kerry is as white as they're made,” replied Seton, “but we should never have known for certain who killed Sir Lucien if he had not risked his life in that filthy cellar as he did.”
 
Rita Irvin shuddered slightly and drew her furs more closely about her shoulders.
 
“Shall we change the conversation, dear?” whispered Margaret.
 
“No, please,” said Rita. “You cannot imagine how curious I am to learn the true details—for, as Monte says, we have been out of touch with things, and although we were so intimately concerned, neither of us really knows the inner history of the affair to this day. Of course, we know that Kazmah was a dummy figure, posed in the big ebony chair. He never moved, except to raise his hand, and this was done by someone seated in the inner room behind the figure. But who was seated there?”
 
Seton glanced inquiringly at his wife, and she nodded, smiling.
 
“Right-o!” he said. “If you will excuse me for a moment I will get my notes. Hello, here's Gray!”
 
A little two-seater came bowling along the road from Cairo, and drew up beneath the balcony. It was the car which had belonged to Margaret when in practice in Dover Street. Quentin Gray jumped out, waving his hand cheerily to the quartette above, and went in at the doorway. Seton walked through the flat and admitted him.
 
“Sorry I'm late!” cried Gray, impetuous and boyish as ever, although he looked older and had grown very bronzed. “The chief detained me.”
 
“Go through to them,” said Seton informally. “I'm getting my notes; we're going to read the thrilling story of the Kazmah mystery before dinner.”
 
“Good enough!” cried Gray. “I'm in the dark on many points.”
 
He had outlived his youthful infatuation, although it was probable enough that had Rita been free he would have presented himself as a suitor without delay. But the old relationship he had no desire to renew. A generous self-effacing regard had supplanted the madness of his earlier passion. Rita had changed too; she had learned to know herself and to know her husband.
 
So that when Seton Pasha presently rejoined his guests, he found the most complete harmony to prevail among them. He carried a bulky notebook, and, tapping his teeth with his monocle:
 
“Ladies and gentlemen,” he began whimsically, “I will bore you with a brief account of the extraordinary facts concerning the Kazmah case.”
 
Margaret was seated in the rest-chair which her husband had vacate............