any circumstances. Nor does it always smile for the chevalier and his son. That is the mystery of it. One never knows when it is going to happen; one never knows why it does happen. But if you could see that uncanny smile——"
"I should like to," interposed Cleek. "That is, if it might happen without any tragical result. Hum-m-m! Nobody but the chevalier and the chevalier's son! And when does it happen in their case, during the course of the show, or when there is nobody about but those connected with it?"
"Oh, always during the course of the entertainment, sir. Indeed, it has never happened at any other time—never at all."
"Oho!" said Cleek. "Then it is only when they are dressed and made up for the performance, eh? Hum-m-m! I see." Then he lapsed into silence for a moment, and sat tracing circles on the floor with the toe of his boot. But, of a sudden: "You came here directly after the matinee, I suppose?" he queried, glancing up at young Scarmelli.
"Yes; in fact, before it was wholly over."
"I see. Then it is just possible that all the performers have not yet got into their civilian clothes. Couldn't manage to take me round behind the scenes, so to speak, if Mr. Narkom will lend us his motor to hurry us there? Could, eh? That's good. I think I'd like to have a look at that lion and, if you don't mind, an introduction to the parties concerned. No! don't fear; we won't startle anybody by revealing my identity or the cause of the visit. Let us say that I'm a vet. to whom you have appealed for an opinion regarding Nero's queer conduct. All ready, Mr. Narkom? Then let's be off."
Two minutes later the red limousine was at the door, and, stepping into it with his two companions, he was whizzed away to Olympia and the first step toward the solution of the riddle.
II
As it is the custom of those connected with the world of the circus to eat, sleep, have their whole being, as it were, within the environment of the show, to the total exclusion of hotels, boarding-houses, or outside lodgings of any sort, he found on his arrival at his destination the entire company assembled in what was known as the "living-tent," chatting, laughing, reading, playing games and killing time generally whilst waiting for the call to the "dining-tent," and this gave him an opportunity to meet all the persons connected with the "case," from the "chevalier" himself to the Brazilian coffee planter who was "backing" the show.
He found this latter individual a somewhat sullen and taciturn man of middle age, who had more the appearance of an Austrian than a Brazilian, and with a swinging gait and an uprightness of bearing which were not to be misunderstood.
"Humph! Known military training," was Cleek's mental comment as soon as he saw the man walk. "Got it in Germany, too; I know that peculiar 'swing.' What's his little game, I wonder? And what's a Brazilian doing in the army of the Kaiser? And, having been in it, what's he doing dropping into this line; backing a circus, and travelling with it like a Bohemian?"
But although these thoughts interested him, he did not put them into words nor take anybody into his confidence regarding them.
As for the other members of the company, he found "the indifferent rider," known as Signor Antonio Martinelli, an undoubted Irishman of about thirty years of age, extremely handsome, but with a certain "shiftiness" of the eye which was far from inspiring confidence, and with a trick of the tongue which suggested that his baptismal certificate probably bore the name of Anthony Martin. He found, too, that all he had heard regarding the youth and beauty of the chevalier's second wife was quite correct, and although she devoted herself a great deal to the Brazilian coffee planter and the Irish-Italian "Martinelli," she had a way of looking over at her middle-aged spouse, without his knowledge, that left no doubt in Cleek's mind regarding the real state of her feelings toward the man. And last, but not least by any means, he found the chevalier himself a frank, open-minded, open-hearted, lovable man, who ought not, in the natural order of things, to have an enemy in the world. Despite his high-falutin nom de théâtre, he was Belgian, a big, soft-hearted, easy-going, unsuspicious fellow, who worshipped his wife, adored his children, and loved every creature of the animal world.
How well that love was returned, Cleek saw when he went with him to that part of the building where his animals were kept, and watched them "nose" his hand or lick his cheek whenever the opportunity offered. But Nero, the lion, was perhaps the greatest surprise of all, for so tame, so docile, so little feared was the animal, that its cage door was open, and they found one of the attendants squatting cross-legged inside and playing with it as though it were a kitten.
"There he is, doctor," said the chevalier, waving his hand toward the beast. "Ah, I will not believe that it was anything but an accident, sir. He loved my boy. He would hurt no one that is kind to him. Fetch him out, Tom, and let the doctor see him at close quarters."
Despite all these assurances of the animal's docility Cleek could not but remember what the creature had done, and, in consequence, did not feel quite at ease when it came lumbering out of the cage with the attendant and ranged up alongside of him, rubbing its huge head against the chevalier's arm after the manner of an affectionate cat.
"Don't be frightened, sir," said Tom, noticing this. "Nothing more'n a big dog, sir. Had the care of him for eight years, I have—haven't I, chevalier?—and never a growl or scratch out of him. No 'smile' for your old Tom, is there, Nero, boy, eh? No fear! Ain't a thing as anybody does with him, sir, that I wouldn't do off-hand and feel quite safe."
"Even to putting your head in his mouth?" queried Cleek.
"Lor', yes!" returned the man, with a laugh. "That's nothing. Done it many a day. Look here!" With that he pulled the massive jaws apart, and, bending down, laid his head within them. The lion stood perfectly passive, and did not offer to close his mouth until it was again empty. It was then that Cleek remembered, and glanced round at young Scarmelli.
"He never 'smiles' for any but the chevalier and his son, I believe you said," he remarked. "I wonder if the chevalier himself would be as safe if he were to make a feint of doing that?" For the chevalier, like most of the other performers, had not changed his dress after the matinee, since the evening performance was so soon to begin; and if, as Cleek had an idea, that the matter of costume and make-up had anything to do with the mystery of the thing, here, surely, was a chance to learn.
"Make a feint of it? Certainly I will, doctor," the chevalier replied. "But why a feint? Why not the actual thing?"
"No, please—at least, not until I have seen how the beast is likely to take it. Just put your head down close to his muzzle, chevalier. Go slow, please, and keep your head at a safe distance."
The chevalier obeyed. Bringing his head down until it was on a level with the animal's own, he opened the ponderous jaws. The beast was as passive as before; and, finding no trace of the coming of the mysterious and dreaded "smile," he laid his face between the double row of gleaming teeth, held it there a moment, and then withdrew it uninjured. Cleek took his chin between his thumb and forefinger and pinched it hard. What he had just witnessed would seem to refute the idea of either costume or make-up having any bearing upon the case.
"Did you do that to-day at the matinee performance, chevalier?" he hazarded, after a moment's thoughtfulness.
"Oh, yes," he replied. "It was not my plan to do so, however. I alter my performance constantly to give variety. To-day I had arranged for my little son to do the trick; but somehow—— Ah! I am a foolish man, monsieur; I have odd fancies, odd whims, sometimes odd fears, since—since that awful night. Something came over me
