At about this limit of mental anarchy Father Brown's view was obscured altogether; for the City magnate in front of him rose to his full height and thrust his hands savagely into all his pockets. Then he sat down nervously, still fumbling, and then stood up again. For an instant it seemed seriously likely that he would stride across the footlights; then he turned a glare at the clown playing the piano; and then he burst in silence out of the room.
The priest had only watched for a few more minutes the absurd but not inelegant dance of the amateur harlequin over his splendidly unconscious foe. With real though rude art, the harlequin danced slowly backwards out of the door into the garden, which was full of moonlight and stillness. The vamped dress of silver paper and paste, which had been too glaring in the footlights, looked more and more magical and silvery as it danced away under a brilliant moon. The audience was closing in with a cataract of applause, when Brown felt his arm abruptly touched, and he was asked in a whisper to come into the colonel's study.
He followed his summoner with increasing doubt, which was not dispelled by a solemn comicality in the scene of the study. There sat Colonel Adams, still unaffectedly dressed as a pantaloon, with the knobbed whalebone nodding above his brow, but with his poor old eyes sad enough to have sobered a Saturnalia. Sir Leopold Fischer was leaning against the mantelpiece and heaving with all the importance of panic.
"This is a very painful matter, Father Brown," said Adams. "The truth is, those diamonds we all saw this afternoon seem to have vanished from my friend's tail-coat pocket. And as you—"
"As I," supplemented Father Brown, with a broad grin, "was sitting just behind him—"
"Nothing of the sort shall be suggested," said Colonel Adams, with a firm look at Fischer, which rather implied that some such thing had been suggested. "I only ask you to give me the assistance that any gentleman might give."
"Which is turning out his pockets," said Father Brown, and proceeded to do so, displaying seven and sixpence, a return ticket, a small silver crucifix, a small breviary, and a stick of chocolate.
The colonel looked at him long, and then said, "Do you know, I should like to see the inside of your head more than the inside of your pockets. My daughter is one of your people, I know; well, she has lately—" and he stopped.
"She has lately," cried out old Fischer, "opened her father's house to a cut-throat Socialist, who says openly he would steal anything from a richer man. This is the end of it. Here is the richer man—and none the richer."
"If you want the inside of my head you can have it," said Brown rather wearily. "What it's worth you can say afterwards. But the first thing I find in that disused pocket is this: that men who mean to steal diamonds don't talk Socialism. They are more likely," he added demurely, "to denounce it."
Both the others shifted sharply and the priest went on:
"You see, we know these people, more or less. That Socialist would no more steal a diamond than a Pyramid. We ought to look at once to the one man we don't know. The fellow acting the policeman—Florian. Where is he exactly at this minute, I wonder."
The pantaloon sprang erect and strode out of the room. An interlude ensued, during which the millionaire stared at the priest, and the priest at his breviary; then the pantaloon returned and said, with staccato gravity, "The policeman is still lying on the stage. The curtain has gone up and down six times; he is still lying there."
Father Brown dropped his book and stood staring with a look of blank mental ruin. Very slowly a light began to creep in his grey eyes, and then he made the scarcely obvious answer.
"Please forgive me, colonel, but when did your wife die?"
"Wife!" replied the staring soldier, "she died this year two months. Her brother James arrived just a week too late to see her."
The little priest bounded like a rabbit shot. "Come on!" he cried in quite unusual excitement. "Come on! We've got to go and look at that policeman!"
They rushed on to the now curtained stage, breaking rudely past the columbine and clown (who seemed whispering quite contentedly), and Father Brown bent over the prostrate comic policeman.
"Chloroform," he said as he rose; "I only guessed it just now."
There was a startled stillness, and then the colonel said slowly, "Please say seriously what all this means."
Father Brown suddenly shouted with laughter, then stopped, and only struggled with it for instants during the rest of his speech. "Gentlemen," he gasped, "there's not much time to talk. I must run after the criminal. But this great French actor who played the policeman—this clever corpse the harlequin waltzed with and dandled and threw about—he was—" His voice again failed him, and he turned his back to run.
"He was?" called Fischer inquiringly.
"A real policeman," said Father Brown, and ran away into the dark.
There were hollows and bowers at the extreme end of that leafy garden, in which the laurels and other immortal shrubs showed against sapphire sky and silver moon, even in that midwinter, warm colours as of the south. The green gaiety of the waving laurels, the rich purple indigo of the night, the moon like a monstrous crystal, make an almost irresponsible romantic picture; and among the top branches of the garden trees a strange figure is climbing, who looks not so much romantic as impossible. He sparkles from head to heel, as if clad in ten million moons; the real moon catches him at every movement and sets a new inch of him on fire. But he swings, flashing and successful, from the short tree in this garden to the tall, rambling tree in the other, and only stops there because a shade has slid under the smaller tree and has unmistakably called up to him.
"Well, Flambeau," says the voice, "you really look like a Flying Star; but that always means a Falling Star at last."
The silver, sparkling figure above seems to lean forward in the laurels and, confident of escape, listens to the little figure below.
"You never did anything better, Flambeau. It was clever to come from Canada (with a Paris ticket, I suppose) just a week after Mrs. Adams died, when no one was in a mood to ask questions. It was cleverer to have marked down the Flying Stars and the very day of Fischer's coming. But there's no cleverness, but mere genius, in what followed. Stealing the stones, I suppose, was nothing to you. You could have done it by sleight of hand in a hundred other ways besides that pretence of putting a paper donkey's tail to Fischer's coat. But in the rest you eclipsed yourself."
The silvery figure among the green leaves seems to linger as if hypnotised, though his escape is easy behind him; he is staring at the man below.
"Oh, yes," says the man below, "I know all about it. I know you not only forced the pantomime, but put it to a double use. You were going to steal the stones quietly; news came by an accomplice that you were already suspected, and a capable police officer was coming to rout you up that very night. A common thief would have been thankful for the warning and fled; but you are a poet. You already had the clever notion of hiding the jewels in a blaze of false stage jewellery. Now, you saw that if the dress were a harlequin's the appearance of a policeman would be quite in keeping. The worthy officer started from Putney police station to find you, and walked into the queerest trap ever set in this world. When the front door opened he walked straight on to the stage of a Christmas pantomime, where he could be kicked, clubbed, stunned and drugged by the dancing harlequin, amid roars of laughter from all the most respectable people in Putney. Oh, you will never do anything better. And now, by the way, you might give me back those diamonds."
The green branch on which the glittering figure swung, rustled as if in astonishment; but the voice went on:
"I want you to give them back, Flambeau, and I want you to give up this life. There is still youth and honour and humour in you; don't fancy they will last in that trade. Men may keep a sort of level of good, but no man has ever been able to keep on one level of evil. That road goes down and down.