"Come along with me to the Athenaeum," he went on, in the same stentorian voice, "and I'll tell you all about it. Most interesting discovery. Makes diamonds cheap as dirt. Calculated to supersede South Africa altogether." Charles allowed himself to be dragged along. There was nothing else possible. Sir Adolphus continued, in a somewhat lower key, induced upon him by Charles's mute look of protest. It was a disquieting story. He told it with gleeful unction. It seems that Professor Schleiermacher, of Jena, "the greatest living authority on the chemistry of gems," he said, had lately invented, or claimed to have invented, a system for artificially producing diamonds, which had yielded most surprising and unexceptionable results. Charles's lip curled slightly. "Oh, I know the sort of thing," he said. "I've heard of it before. Very inferior stones, quite small and worthless, produced at immense cost, and even then not worth looking at. I'm an old bird, you know, Cordery; not to be caught with chaff. Tell me a better one!" Sir Adolphus produced a small cut gem from his pocket. "How's that for the first water?" he inquired, passing it across, with a broad smile, to the sceptic. "Made under my own eyes--and quite inexpensively!" Charles examined it close, stopping short against the railings in St. James's Square to look at it with his pocket-lens. There was no denying the truth. It was a capital small gem of the finest quality. "Made under your own eyes?" he exclaimed, still incredulous. "Where, my dear sir?--at Jena?" The answer was a thunderbolt from a blue sky. "No, here in London; last night as ever was; before myself and Dr. Gray; and about to be exhibited by the President himself at a meeting of Fellows of the Royal Society." Charles drew a long breath. "This nonsense must be stopped," he said firmly--"it must be nipped in the bud. It won't do, my dear friend; we can't have such tampering with important Interests." "How do you mean?" Cordery asked, astonished. Charles gazed at him steadily. I could see by the furtive gleam in my brother-in-law's eye he was distinctly frightened. "Where _is_ the fellow?" he asked. "Did he come himself, or send over a deputy?" "Here in London," Sir Adolphus replied. "He's staying at my house; and he says he'll be glad to show his experiments to anybody scientifically interested in diamonds. We propose to have a demonstration of the process to-night at Lancaster Gate. Will you drop in and see it?" Would he "drop in" and see it? "Drop in" at such a function! Could he possibly stop away? Charles clutched the enemy's arm with a nervous grip. "Look here, Cordery," he said, quivering; "this is a question affecting very important Interests. Don't do anything rash. Don't do anything foolish. Remember that Shares may rise or fall on this." He said "Shares" in a tone of profound respect that I can hardly even indicate. It was the crucial word in the creed of his religion.