"Your name," said the young man, "is Saradine?"
Saradine assented rather negligently.
The new-comer had dull, dog-like brown eyes, as different as possible from the restless and glittering grey eyes of the prince. But once again Father Brown was tortured with a sense of having seen somewhere a replica of the face; and once again he remembered the repetitions of the glass-panelled room, and put down the coincidence to that. "Confound this crystal palace!" he muttered. "One sees everything too many times. It's like a dream."
"If you are Prince Saradine," said the young man, "I may tell you that my name is Antonelli."
"Antonelli," repeated the prince languidly. "Somehow I remember the name."
"Permit me to present myself," said the young Italian.
With his left hand he politely took off his old-fashioned top-hat; with his right he caught Prince Saradine so ringing a crack across the face that the white top hat rolled down the steps and one of the blue flower-pots rocked upon its pedestal.
The prince, whatever he was, was evidently not a coward; he sprang at his enemy's throat and almost bore him backwards to the grass. But his enemy extricated himself with a singularly inappropriate air of hurried politeness.
"That is all right," he said, panting and in halting English. "I have insulted. I will give satisfaction. Marco, open the case."
The man beside him with the earrings and the big black case proceeded to unlock it. He took out of it two long Italian rapiers, with splendid steel hilts and blades, which he planted point downwards in the lawn. The strange young man standing facing the entrance with his yellow and vindictive face, the two swords standing up in the turf like two crosses in a cemetery, and the line of the ranked towers behind, gave it all an odd appearance of being some barbaric court of justice. But everything else was unchanged, so sudden had been the interruption. The sunset gold still glowed on the lawn, and the bittern still boomed as announcing some small but dreadful destiny.
"Prince Saradine," said the man called Antonelli, "when I was an infant in the cradle you killed my father and stole my mother; my father was the more fortunate. You did not kill him fairly, as I am going to kill you. You and my wicked mother took him driving to a lonely pass in Sicily, flung him down a cliff, and went on your way. I could imitate you if I chose, but imitating you is too vile. I have followed you all over the world, and you have always fled from me. But this is the end of the world—and of you. I have you now, and I give you the chance you never gave my father. Choose one of those swords."
Prince Saradine, with contracted brows, seemed to hesitate a moment, but his ears were still singing with the blow, and he sprang forward and snatched at one of the hilts. Father Brown had also sprung forward, striving to compose the dispute; but he soon found his personal presence made matters worse. Saradine was a French freemason and a fierce atheist, and a priest moved him by the law of contraries. And for the other man neither priest nor layman moved him at all. This young man with the Bonaparte face and the brown eyes was something far sterner than a puritan—a pagan. He was a simple slayer from the morning of the earth; a man of the stone age—a man of stone.
One hope remained, the summoning of the household; and Father Brown ran back into the house. He found, however, that all the under servants had been given a holiday ashore by the autocrat Paul, and that only the sombre Mrs. Anthony moved uneasily about the long rooms. But the moment she turned a ghastly face upon him, he resolved one of the riddles of the house of mirrors. The heavy brown eyes of Antonelli were the heavy brown eyes of Mrs. Anthony; and in a flash he saw half the story.
"Your son is outside," he said without wasting words; "either he or the prince will be killed. Where is Mr. Paul?"
"He is at the landing-stage," said the woman faintly. "He is—he is—signalling for help."
"Mrs. Anthony," said Father Brown seriously, "there is no time for nonsense. My friend has his boat down the river fishing. Your son's boat is guarded by your son's men. There is only this one canoe; what is Mr. Paul doing with it?"
"Santa Maria! I do not know," she said; and swooned all her length on the matted floor.
Father Brown lifted her to a sofa, flung a pot of water over her, shouted for help, and then rushed down to the landing-stage of the little island. But the canoe was already in mid-stream, and old Paul was pulling and pushing it up the river with an energy incredible at his years.
"I will save my master," he cried, his eyes blazing maniacally. "I will save him yet!"
Father Brown could do nothing but gaze after the boat as it struggled up-stream and pray that the old man might waken the little town in time.
"A duel is bad enough," he muttered, rubbing up his rough dust-coloured hair, "but there's something wrong about this duel, even as a duel. I feel it in my bones. But what can it be?"
As he stood staring at the water, a wavering mirror of sunset, he heard from the other end of the island garden a small but unmistakable sound—the cold concussion of steel. He turned his head.
Away on the farthest cape or headland of the long islet, on a strip of turf beyond the last rank of roses, the duellists had already crossed swords. Evening above them was a dome of virgin gold, and, distant as they were, every detail was picked out. They had cast off their coats, but the yellow waistcoat and white hair of Saradine, the red waistcoat and white trousers of Antonelli, glittered in the level light like the colours of the dancing clockwork dolls. The two swords sparkled from point to pommel like two diamond pins. There was something frightful in the two figures appearing so little and so gay. They looked like two butterflies trying to pin each other to a cork.
Father Brown ran as hard as he could, his little legs going like a wheel. But when he came to the field of combat he found he was born too late and too early—too late to stop the strife, under the shadow of the grim Sicilians leaning on their oars, and too early to anticipate any disastrous issue of it. For the two men were singularly well matched, the prince using his skill with a sort of cynical confidence, the Sicilian using his with a murderous care. Few finer fencing matches can ever have been seen in crowded amphitheatres than that which tinkled and sparkled on that forgotten island in the reedy river. The dizzy fight was balanced so long that hope began to revive in the protesting priest; by all common probability Paul must soon come back with the police. It would be some comfort even if Flambeau came back from his fishing, for Flambeau, physically speaking, was worth four other men. But there was no sign of Flambeau, and, what was much queerer, no sign of Paul or the police. No other raft or stick was left to float on; in that lost island in that vast nameless pool, they were cut off as on a rock in the Pacific.
Almost as he had the thought the ringing of the rapiers quickened to a rattle, the prince's arms flew up, and the point shot out behind between his shoulder-blades. He went over with a great whirling movement, almost like one throwing the half of a boy's cart-wheel. The sword flew from his hand like a shooting star, and dived into the distant river. And he himself sank with so earth-shaking a subsidence that he broke a big rose-tree with his body and shook up into the sky a cloud of red earth—like the smoke of some heathen sacrifice. The Sicilian had made blood-offering to the ghost of his father.
The priest was instantly on his knees by the corpse; but only to make too sure that it was a corpse. As he was still trying some last hopeless tests he heard for the first time voices from farther up the river, and saw a police boat shoot up to the landing-stage, with constables and other important people, including the excited Paul. The little priest rose with a distinctly dubious grimace.
"Now, why on earth," he muttered, "why on earth couldn't he have come before?"
Some seven minutes later the island was occupied by an invasion of townsfolk and police,