"On such a night did young Lorenzo," quoted the Commissioner's brogue from the flight of steps where, in the guise of a French cook, he was fanning Laila Bonaventura, with whom he had been dancing; the latter sitting still and silent as the shadow in which she was half hidden. A crackling laugh betrayed Dr. Dillon's whereabouts. He was perched on a balustrade above, his legs dangling, his trousers, as usual, displaying his thin ankles; for he was dressed in his ordinary evening suit.

"And old Lorenzo also," he scoffed. "The disease is nonprotective, contagious, and marked by extraordinary vitality in the virus, which after long years may spring to fresh life from a dress, a bit of ribbon, a lock of hair."

"Oh! have done with such blasphemy!" interrupted the Commissioner, joyously, "and me racking me brains which of all the beauties of this hareem I'd better fall in love with! Dering, you're a steward, I believe. Turn that man out for obtruding the exigencies of everyday life--including a swallow-tail coat--into Paradise."

"I've objected already, sir," said Vincent Dering, laughing; "but he declares he is a malarial bacillus."

"A what?" remonstrated the brogue.

"A malarial bacillus, sir," explained the doctor; "as I have failed hitherto--like everybody else--to recognize the gentleman, even through a microscope, I am naturally at sea as to the proper costume. And you will, of course, admit the universal rule: 'When in doubt, play a dress suit.'"

"By Jove!" ejaculated Lance Carlyon, who, mopping his face, had joined the group, "what a ripping idea. Wish I'd thought of it instead of this kit." He looked regretfully at his mailed limbs; for he was dressed as Lancelot-du-Lac, a costume which had been chosen for him two years before, at Simla, by a grass widow who had aspired to the part of Guinevere; but who, retiring before the young fellow's absolute unconsciousness of her intention, had left him saddled with an expensive fancy dress which he felt bound to wear out; for all his spare cash was kept for guns and polo ponies.

"I'm glad you didn't, Mr. Carlyon," protested Muriel Smith, consolingly. "You look very nice in it. Only those things on your legs--I forget the proper name--must be difficult to dance in."

"Greaves--the well-greaved Greeks, me dear madam," put in the Commissioner. "Plural of grief. Ah! ye should have seen him come to it just now with the general's wife. Your chance of promotion's gone, me dear boy--the marble floor resounded."

"Well, it isn't half so inconvenient as my husband's dress, anyhow," continued Mrs. Smith, persisting in her mission of sympathy, when the laugh at Lance's expense had subsided.