"Nonsense!" laughed Drayton. "That Dante Purgatory stuff has got your goat, Terry. Not," he added hastily, "that I am ridiculing the story, but you will admit that it is slightly-just slightly-improbable. Here!" He snatched a newspaper from a near-by table and spread it on the floor between them. "Give me that vial and I'll see if it is possible to get the cap open without injury. We mustn't risk any vandalism. It is a beautiful piece of work, Cellini or no Cellini."
Feeling in his pocket, he drew out a serviceable penknife, opened the large blade, and took the crystal vial from Trenmore's still reluctant hand. As the description had stated, the hinged cover, besides being fastened with a tiny hasp that formed the buckle of the jeweled collar, was cemented down. The cement showed as a thin, reddish line between silver and crystal. The lower sections of hinge and hasp were riveted to the crystal.
Drayton ran the point of his blade cautiously around the red line. "Hard as steel," he commented. "After all, perhaps we can't open it."
A flash of relief lighted Trenmore's heavy, anxious face. He stretched a quick hand to reclaim the vial, but Drayton drew back. Opening a thin small blade, he tried the cement from another angle.
"Aha!" said he triumphantly. "That does it. This stuff is old. I can't cut it, but you see it's easy to separate the cement from the crystal by running the blade underneath. And now-careful does it. There! Let's see how the hasp works."
He fumbled with it for a moment. There came a little snap, and the cover flew up as if propelled by a spring. At the same time a tiny cloud of fine, grayish particles arose from the open vial. They gleamed like diamond dust in the sunlight.
With a quick gasp, Trenmore sat back in his chair. Though the room was cool, his face was shining with perspiration; but Drayton paid him no heed. The ex-lawyer's curiosity was by this time fully aroused, and it was unclouded by any wraith of the superstition which claimed for the gray powder so unnatural an origin.
Without hesitation, he stooped and carefully emptied the vial upon the paper at his feet. The Dust was so finely pulverized that he had to proceed with the utmost care to prevent the stuff from rising into the air. At last the vial was empty. A dark heap, resembling gray flour or powdered emery, had been its sole contents.
"I was wrong," remarked Drayton, sitting up with the Cerberus in his hand. "There was nothing there but the Dust."
Now it was strange that after all his nervous dread and horror of the Dust, Trenmore should have done what he did. Perhaps, having seen Drayton handle it without harm, he had lost this fear; or it might have been the natural heedlessness of his impulsive nature. Whatever the explanation, as Drayton ceased speaking his friend leaned over and deliberately thrust two fingers into the powder, stirring it about and feeling its soft fineness.