But Chang was no more to be drawn than on a previous occasion. "Your surmises are intelligent, Mr. Barnard, but I fear I cannot discuss them."

So there they were again, Conway reflected, edging the invisible borderline between what might and might not be revealed. He thought he could soon begin to map out that line in imagination, though the impact of a new surprise deferred the matter. For servants were already bringing in the shallow bowls of scented tea, and along with the agile, lithe-limbed Tibetans there had also entered, quite inconspicuously, a girl in Chinese dress. She went directly to the harpsichord and began to play a gavotte by Rameau. The first bewitching twang stirred in Conway a pleasure that was beyond amazement; those silvery airs of eighteenth-century France seemed to match in elegance the Sung vases and exquisite lacquers and the lotus pool beyond; the same death-defying fragrance hung about them, lending immortality through an age to which their spirit was alien. Then he noticed the player. She had the long, slender nose, high cheekbones, and eggshell pallor of the Manchu; her black hair was drawn tightly back and braided; she looked very finished and miniature. Her mouth was like a little pink convolvulus, and she was quite still, except for her long-fingered hands. As soon as the gavotte was ended, she made a little obeisance and went out.

Chang smiled after her and then, with a touch of personal triumph, upon Conway. "You are pleased?" he queried.

"Who is she?" asked Mallinson, before Conway could reply.

"Her name is Lo-Tsen. She has much skill with Western keyboard music. Like myself, she has not yet attained the full initiation."

"I should think not, indeed!" exclaimed Miss Brinklow. "She looks hardly more than a child. So you have women lamas, then?"

"There are no sex distinctions among us."

"Extraordinary business, this lamahood of yours," Mallinson commented loftily, after a pause. The rest of the tea-drinking proceeded without conversation; echoes of the harpsichord seemed still in the air, imposing a strange spell. Presently, leading the departure from the pavilion, Chang ventured to hope that the tour had been enjoyable. Conway, replying for the others, seesawed with the customary courtesies. Chang then assured them of his own equal enjoyment, and hoped they would consider the resources of the music room and library wholly at their disposal throughout their stay. Conway, with some sincerity, thanked him again. "But what about the lamas?" he added. "Don't they ever want to use them?"

"They yield place with much gladness to their honored guests."

"Well, that's what I call real handsome," said Barnard. "And what's more, it shows that the lamas do really know we exist. That's a step forward, anyhow, makes me feel much more at home. You've certainly got a swell outfit here, Chang, and that little girl of yours plays the pi-anno very nicely. How old would she be, I wonder?"

"I am afraid I cannot tell you."

Barnard laughed. "You don't give away secrets about a lady's age, is that it?"

"Precisely," answered Chang with a faintly shadowing smile.

That evening, after dinner, Conway made occasion to leave the others and stroll out into the calm, moon-washed courtyards. Shangri-La was lovely then, touched with the mystery that lies at the core of all loveliness. The air was cold and still; the mighty spire of Karakal looked nearer, much nearer than by daylight. Conway was physically happy, emotionally satisfied, and mentally at ease; but in his intellect, which was not quite the same thing as mind, there was a little stir. He was puzzled. The line of secrecy that he had begun to map out grew sharper, but only to reveal an inscrutable background. The whole amazing series of events that had happened to him and his three chance companions swung now into a sort of focus; he could not yet understand them, but he believed they were somehow to be understood.

Passing along a cloister, he reached the terrace leaning over the valley. The scent of tuberose assailed him, full of delicate associations; in China it was called "the smell of moonlight." He thought whimsically that if moonlight had a sound also, it might well be the Rameau gavotte he had heard so recently; and that set him thinking of the little Manchu. It had not occurred to him to picture women at Shangri-La; one did not associate their presence with the general practice of monasticism. Still, he reflected, it might not be a disagreeable innovation; indeed, a female harpsichordist might be an asset to any community that permitted itself to be (in Chang's words) "moderately heretical."

He gazed over the edge into the blue-black emptiness. The drop was phantasmal; perhaps as much as a mile. He wondered if he would be allowed to descend it and inspect the valley civilization that had been talked of. The notion of this strange culture pocket, hidden amongst unknown ranges, and ruled over by some vague kind of theocracy, interested him as a student of history, apart from the curious though perhaps related secrets of the lamasery.

Suddenly, on a flutter of air, came sounds from far below. Listening intently, he could hear gongs and trumpets and also (though perhaps only in imagination) the massed wail of voices. The sounds faded on a veer of the wind, then returned to fade again. But the hint of life and liveliness in those veiled depths served only to emphasize the austere serenity of Shangri-La. Its forsaken courts and pale pavilions shimmered in repose from which all the fret of existence had ebbed away, leaving a hush as if moments hardly dared to pass. Then, from a window high above the terrace, he caught the rose-gold of lantern light; was it there that the lamas devoted themselves to contemplation and the pursuit of wisdom, and were those devotions now in progress? The problem seemed one that he could solve merely by entering at the nearest door and exploring through gallery and corridor until the truth were his; but he knew that such freedom was illusory, and that in fact his movements were watched. Two Tibetans had padded across the terrace and were idling near the parapet. Good-humored fellows they looked, shrugging their colored cloaks negligently over naked shoulders. The whisper of gongs and trumpets uprose again, and Conway heard one of the men question his companion. The answer came: "They have buried Talu." Conway, whose knowledge of Tibetan was very slight, hoped they would continue talking; he could not gather much from a single remark. After a pause the questioner, who was inaudible, resumed the conversation, and obtained answers which Conway overheard and loosely understood as follows:

"He died outside."

"He obeyed the high ones of Shangri-La."

"He came through the air over the great mountains with a bird to hold him."

"Strangers he brought, also."

"Talu was not afraid of the outside wind, nor of the outside cold."

"Though he went outside long ago, the valley of Blue Moon remembers him still."

Nothing more was said that Conway could interpret, and after waiting for some time he went back to his own quarters. He had heard enough to turn another key in the locked mystery, and it fitted so well that he wondered he had failed to supply it by his own deductions. It had, of course, crossed his mind, but a certain initial and fantastic unreasonableness about it had been too much for him. Now he perceived that the unreasonableness, however fantastic, was to be swallowed. That flight from Baskul had not been the meaningless exploit of a madman. It had been something planned, prepared, and carried out at the instigation of Shangri-La. The dead pilot was known by name to those who lived there; he had been one of them, in some sense; his death was mourned. Everything pointed to a high directing intelligence bent upon its own purposes; there had been, as it were, a single arch of intentions spanning the inexplicable hours and miles. But what WAS that intention? For what possible reason could four chance passengers in the British government aeroplane be whisked away to these trans-Himalayan solitudes?