"Oh, in China! I was thinking of Paree," chuckled Billings, with a gay air and another glance at me. Then his nerve withered under the professor's blank stare, and he added hurriedly:

"H'm! So it was in China you saw the other piece of silk?"

The professor sighed profoundly. His reply came dreamily, regretfully:

"In the Purple Forbidden City; but I was not quick enough."

"Not quick enough?" Billings' echo was solicitous, sympathetic.

"It was among the palace treasures, the imperial properties—things unhappily lost to the world and civilization. Ah, gentlemen, I erred; I committed a fatal mistake; it has been a matter of deep mortification to me often!" His head wagged somberly.

Billings looked a little embarrassed and rubbed his chin. "H'm!" he coughed. "I guess we all slip a cog now and then. I know I've done things myself I've been rather ash—"

"I erred, gentlemen," went on the professor, "in trusting most unscientifically to the false principle that the hand is quicker than the eye. It is not true, for one of the guards saw me and my carelessness cost me dearly: I not only lost the silk, but a singularly beautiful gold thread altar cloth and a matchless amulet of yu-chi jade, you know—white jade, at that, gentlemen, I assure you—a rare bit of carving of the second century—real Khoton jade, too—no base fei-tsui. But, alas! I lost them, my friends; they confiscated them, and no doubt they are still there in their original places from which I had—a—attached them. Do you wonder at my mortification? And then the sacrifice of a whole year of planning, watching, bribing and perfecting of preliminary disguise! All fruitless, fruitless!"

The professor lifted and dropped his palms in eloquent deprecation.

Billings' foot pressed mine. "Now, wouldn't that frost you?" he whispered under his breath. Aloud he exclaimed indignantly: