"Well, that WAS queer," Guy replied, relaxing into a smile, "queer even for us; I won't deny it; for it happened this way. I was over in Brussels at the time, as correspondent for the Sphere at the International Workmen's Congress, and Cyril was away by himself just then on his holiday in the Orkneys. We both got toothache in the self-same tooth on the self-same night; and we both lay awake for hours in misery. Early in the morning we each of us got up--five hundred miles away from one another, remember--and as soon as we were dressed _I_ went into a dentist's in the Montagne de la Cour, and Cyril to a local doctor's at Larwick; and we each of us had it out, instanter. The dentists both declared they could save them if we wished; but we each preferred the loss of a tooth to another such night of abject misery." Nevitt stroked his moustache with a reflective air. This was almost miraculous. "Well, I should think," he said at last, after close reflection, "where such sympathy as that exists between two brothers, if Cyril had really been hurt in this accident, you must surely in some way have been dimly conscious of it." Guy Waring, standing there, telegram in hand, looked down at his companion with a somewhat contemptuous smile. "Oh dear, no," he answered, with common-sense confidence; for he loved not mysteries. "You don't believe any nonsense of that sort, do you? There's nothing in the least mystical in the kind of sympathy that exists between Cyril and myself. It's all purely physical. We're very like one another. But that's all. There's none of the Corsican Brothers sort of hocus-pocus about us in any way. The whole thing is a simple caste of natural causation." "Then you don't believe in brain-waves?" Nevitt suggested, with a gracefully appropriate undulation of his small white hand. Guy laughed incredulously. "All rubbish, my dear fellow," he answered, "all utter rubbish. If any man knows, it's myself and Cyril. We're as near one another as any two men on earth could possibly be; but when we want to communicate our ideas, each to each, we have to speak or write, just like the rest of you. Every man is like a clock wound up to strike certain hours. Accidents may happen, events may intervene, the clock may get smashed, and all may be prevented. But, bar accidents, it'll strike all right, under ordinary circumstances, when the hour arrives for it. Well, Cyril and I, as I always say, are like two clocks wound up at the same time to strike together, and we strike with very unusual regularity. But that's the whole mystery. If _I_ get smashed by accident, there's no reason on earth why Cyril shouldn't run on for years yet as usual; and if Cyril got smashed, there's no reason on earth why I should ever know anything about it except from the newspapers." CHAPTER IV. INSIDE THE TUNNEL.