"Yes," he accordingly replied, with crisp deliberation, as he re-crossed the room; "yes, I will, Max. Here is the clue to what seems to be a rather remarkable fraud." He put the tetradrachm into his host's hand. "What do you make of it?" For a few seconds Carrados handled the piece with the delicate manipulation of his finger-tips while Carlyle looked on with a self-appreciative grin. Then with equal gravity the blind man weighed the coin in the balance of his hand. Finally he touched it with his tongue. "Well?" demanded the other. "Of course I have not much to go on, and if I was more fully in your confidence I might come to another conclusion----" "Yes, yes," interposed Carlyle, with amused encouragement. "Then I should advise you to arrest the parlourmaid, Nina Brun, communicate with the police authorities of Padua for particulars of the career of Helene Brunesi, and suggest to Lord Seastoke that he should return to London to see what further depredations have been made in his cabinet." Mr. Carlyle's groping hand sought and found a chair, on to which he dropped blankly. His eyes were unable to detach themselves for a single moment from the very ordinary spectacle of Mr. Carrados's mildly benevolent face, while the sterilized ghost of his now forgotten amusement still lingered about his features. "Good heavens!" he managed to articulate, "how do you know?" "Isn't that what you wanted of me?" asked Carrados suavely. "Don't humbug, Max," said Carlyle severely. "This is no joke." An undefined mistrust of his own powers suddenly possessed him in the presence of this mystery. "How do you come to know of Nina Brun and Lord Seastoke?" "You are a detective, Louis," replied Carrados. "How does one know these things? By using one's eyes and putting two and two together." Carlyle groaned and flung out an arm petulantly. "Is it all bunkum, Max? Do you really see all the time--though that doesn't go very far towards explaining it." "Like Vidal, I see very well--at close quarters," replied Carrados, lightly running a forefinger along the inscription on the tetradrachm. "For longer range I keep another pair of eyes. Would you like to test them?" Mr. Carlyle's assent was not very gracious; it was, in fact, faintly sulky. He was suffering the annoyance of feeling distinctly unimpressive in his own department; but he was also curious. "The bell is just behind you, if you don't mind," said his host. "Parkinson will appear. You might take note of him while he is in." The man who had admitted Mr. Carlyle proved to be Parkinson. "This gentleman is Mr. Carlyle, Parkinson," explained Carrados the moment the man entered. "You will remember him for the future?" Parkinson's apologetic eye swept the visitor from head to foot, but so lightly and swiftly that it conveyed to that gentleman the comparison of being very deftly dusted. "I will endeavour to do so, sir," replied Parkinson, turning again to his master.