"He turned up suddenly in his ancient haunts about four months ago," said Walcott, "as grand, gloomy, and peculiar as Napoleon ever was in his palmiest days. The younger members of the club call him 'Zanona Redivivus'. He wanders through the house usually late at night, apparently without noticing anything or anybody. His mind seems to be deeply and busily at work, leaving his bodily self to wander as it may happen. Naturally, strange stories are told of him; indeed, his individuality and his habit of doing some unexpected thing, and doing it in such a marvellously original manner that men who are experts at it look on in wonder, cannot fail to make him an object of interest. He has never been known to play at any game whatever, and yet one night he sat down to the chess table with old Admiral Du Brey. You know the Admiral is the great champion since he beat the French and English officers in the tournament last winter. Well, you also know that the conventional openings at chess are scientifically and accurately determined. To the utter disgust of Du Brey, Mason opened the game with an unheard of attack from the extremes of the board. The old Admiral stopped and, in a kindly patronizing way, pointed out the weak and absurd folly of his move and asked him to begin again with some one of the safe openings. Mason smiled and answered that if one had a head that he could trust he should use it; if not, then it was the part of wisdom to follow blindly the dead forms of some man who had a head. Du Brey was naturally angry and set himself to demolish Mason as quickly as possible. The game was rapid for a few moments. Mason lost piece after piece. His opening was broken and destroyed and its utter folly apparent to the lookers-on. The Admiral smiled and the game seemed all one-sided, when, suddenly, to his utter horror, Du Brey found that his king was in a trap. The foolish opening had been only a piece of shrewd strategy. The old Admiral fought and cursed and sacrificed his pieces, but it was of no use. He was gone. Mason checkmated him in two moves and arose wearily. "'Where in Heaven's name, man,' said the old Admiral, thunderstruck, 'did you learn that masterpiece?' "'Just here,' replied Mason. 'To play chess, one should know his opponent. How could the dead masters lay down rules by which you could be beaten, sir? They had never seen you'; and thereupon he turned and left the room. Of course, St. Clair, such a strange man would soon become an object of all kinds of mysterious rumors. Some are true and some are not. At any rate, I know that Mason is an unusual man with a gigantic intellect. Of late he seems to have taken a strange fancy to me. In fact, I seem to be the only member of the club that he will talk with, and I confess that he startles and fascinates me. He is an original genius, St. Clair, of an unusual order."