With a gesture of powerful impatience, Flambeau rattled at the window, wrenched it open, and put an indignant head into the lamp-lit room.
"Well," he cried. "I can understand you may need some refreshment, but really to steal your master's dinner while he lies murdered in the garden—"
"I have stolen a great many things in a long and pleasant life," replied the strange old gentleman placidly; "this dinner is one of the few things I have not stolen. This dinner and this house and garden happen to belong to me."
A thought flashed across Flambeau's face. "You mean to say," he began, "that the will of Prince Saradine—"
"I am Prince Saradine," said the old man, munching a salted almond.
Father Brown, who was looking at the birds outside, jumped as if he were shot, and put in at the window a pale face like a turnip.
"You are what?" he repeated in a shrill voice.
"Paul, Prince Saradine, A vos ordres," said the venerable person politely, lifting a glass of sherry. "I live here very quietly, being a domestic kind of fellow; and for the sake of modesty I am called Mr. Paul, to distinguish me from my unfortunate brother Mr. Stephen. He died, I hear, recently—in the garden. Of course, it is not my fault if enemies pursue him to this place. It is owing to the regrettable irregularity of his life. He was not a domestic character."
He relapsed into silence, and continued to gaze at the opposite wall just above the bowed and sombre head of the woman. They saw plainly the family likeness that had haunted them in the dead man. Then his old shoulders began to heave and shake a little, as if he were choking, but his face did not alter.
"My God!" cried Flambeau after a pause, "he's laughing!"
"Come away," said Father Brown, who was quite white. "Come away from this house of hell. Let us get into an honest boat again."
Night had sunk on rushes and river by the time they had pushed off from the island, and they went down-stream in the dark, warming themselves with two big cigars that glowed like crimson ships' lanterns. Father Brown took his cigar out of his mouth and said:
"I suppose you can guess the whole story now? After all, it's a primitive story. A man had two enemies. He was a wise man. And so he discovered that two enemies are better than one."
"I do not follow that," answered Flambeau.
"Oh, it's really simple," rejoined his friend. "Simple, though anything but innocent. Both the Saradines were scamps, but the prince, the elder, was the sort of scamp that gets to the top, and the younger, the captain, was the sort that sinks to the bottom. This squalid officer fell from beggar to blackmailer, and one ugly day he got his hold upon his brother, the prince. Obviously it was for no light matter, for Prince Paul Saradine was frankly 'fast,' and had no reputation to lose as to the mere sins of society. In plain fact, it was a hanging matter, and Stephen literally had a rope round his brother's neck. He had somehow discovered the truth about the Sicilian affair, and could prove that Paul murdered old Antonelli in the mountains. The captain raked in the hush money heavily for ten years, until even the prince's splendid fortune began to look a little foolish.
"But Prince Saradine bore another burden besides his blood-sucking brother. He knew that the son of Antonelli, a mere child at the time of the murder, had been trained in savage Sicilian loyalty, and lived only to avenge his father, not with the gibbet (for he lacked Stephen's legal proof), but with the old weapons of vendetta. The boy had practised arms with a deadly perfection, and about the time that he was old enough to use them Prince Saradine began, as the society papers said, to travel. The fact is that he began to flee for his life, passing from place to place like a hunted criminal; but with one relentless man upon his trail. That was Prince Paul's position, and by no means a pretty one. The more money he spent on eluding Antonelli the less he had to silence Stephen. The more he gave to silence Stephen the less chance there was of finally escaping Antonelli. Then it was that he showed himself a great man—a genius like Napoleon.
"Instead of resisting his two antagonists, he surrendered suddenly to both of them. He gave way like a Japanese wrestler, and his foes fell prostrate before him. He gave up the race round the world, and he gave up his address to young Antonelli; then he gave up everything to his brother. He sent Stephen money enough for smart clothes and easy travel, with a letter saying roughly: 'This is all I have left. You have cleaned me out. I still have a little house in Norfolk, with servants and a cellar, and if you want more from me you must take that. Come and take possession if you like, and I will live there quietly as your friend or agent or anything.' He knew that the Sicilian had never seen the Saradine brothers save, perhaps, in pictures; he knew they were somewhat alike, both having grey, pointed beards. Then he shaved his own face and waited. The trap worked. The unhappy captain, in his new clothes, entered the house in triumph as a prince, and walked upon the Sicilian's sword.
"There was one hitch, and it is to the honour of human nature. Evil spirits like Saradine often blunder by never expecting the virtues of mankind. He took it for granted that the Italian's blow, when it came, would be dark, violent and nameless, like the blow it avenged; that the victim would be knifed at night, or shot from behind a hedge, and so die without speech. It was a bad minute for Prince Paul when Antonelli's chivalry proposed a formal duel, with all its possible explanations. It was then that I found him putting off in his boat with wild eyes. He was fleeing, bareheaded, in an open boat before Antonelli should learn who he was.
"But, however agitated, he was not hopeless. He knew the adventurer and he knew the fanatic. It was quite probable that Stephen, the adventurer, would hold his tongue, through his mere histrionic pleasure in playing a part, his lust for clinging to his new cosy quarters, his rascal's trust in luck, and his fine fencing. It was certain that Antonelli, the fanatic, would hold his tongue, and be hanged without telling tales of his family. Paul hung about on the river till he knew the fight was over. Then he roused the town, brought the police, saw his two vanquished enemies taken away forever, and sat down smiling to his dinner."
"Laughing, God help us!" said Flambeau with a strong shudder. "Do they get such ideas from Satan?"
"He got that idea from you," answered the priest.
"God forbid!" ejaculated Flambeau. "From me! What do you mean!"
The priest pulled a visiting-card from his pocket and held it up in the faint glow of his cigar; it was scrawled with green ink.
"Don't you remember his original invitation to you?" he asked, "and the compliment to your criminal exploit? 'That trick of yours,' he says, 'of getting one detective to arrest the other'? He has just copied your trick. With an enemy on each side of him, he slipped swiftly out of the way and let them collide and kill each other."
Flambeau tore Prince Saradine's card from the priest's hands and rent it savagely in small pieces.
"There's the last of that old skull and crossbones," he said as he scattered the pieces upon the dark and disappearing waves of the stream; "but I should think it would poison the fishes."
The last gleam of white card and green ink was drowned and darkened; a faint and vibrant colour as of morning changed the sky, and the moon behind the grasses grew paler. They drifted in silence.