"I am a priest," he cried unsteadily, "and a priest should be no shedder of blood. I—I mean that he should bring no one to the gallows. And I thank God that I see the criminal clearly now—because he is a criminal who cannot be brought to the gallows."
"You will not denounce him?" inquired the doctor.
"He would not be hanged if I did denounce him," answered Wilfred with a wild but curiously happy smile. "When I went into the church this morning I found a madman praying there—that poor Joe, who has been wrong all his life. God knows what he prayed; but with such strange folk it is not incredible to suppose that their prayers are all upside down. Very likely a lunatic would pray before killing a man. When I last saw poor Joe he was with my brother. My brother was mocking him."
"By Jove!" cried the doctor, "this is talking at last. But how do you explain—"
The Rev. Wilfred was almost trembling with the excitement of his own glimpse of the truth. "Don't you see; don't you see," he cried feverishly; "that is the only theory that covers both the queer things, that answers both the riddles. The two riddles are the little hammer and the big blow. The smith might have struck the big blow, but would not have chosen the little hammer. His wife would have chosen the little hammer, but she could not have struck the big blow. But the madman might have done both. As for the little hammer—why, he was mad and might have picked up anything. And for the big blow, have you never heard, doctor, that a maniac in his paroxysm may have the strength of ten men?"
The doctor drew a deep breath and then said, "By golly, I believe you've got it."
Father Brown had fixed his eyes on the speaker so long and steadily as to prove that his large grey, ox-like eyes were not quite so insignificant as the rest of his face. When silence had fallen he said with marked respect: "Mr. Bohun, yours is the only theory yet propounded which holds water every way and is essentially unassailable. I think, therefore, that you deserve to be told, on my positive knowledge, that it is not the true one." And with that the old little man walked away and stared again at the hammer.
"That fellow seems to know more than he ought to," whispered the doctor peevishly to Wilfred. "Those popish priests are deucedly sly."
"No, no," said Bohun, with a sort of wild fatigue. "It was the lunatic. It was the lunatic."
The group of the two clerics and the doctor had fallen away from the more official group containing the inspector and the man he had arrested. Now, however, that their own party had broken up, they heard voices from the others. The priest looked up quietly and then looked down again as he heard the blacksmith say in a loud voice:
"I hope I've convinced you, Mr. Inspector. I'm a strong man, as you say, but I couldn't have flung my hammer bang here from Greenford. My hammer hasn't got wings that it should come flying half a mile over hedges and fields."
The inspector laughed amicably and said: "No, I think you can be considered out of it, though it's one of the rummiest coincidences I ever saw. I can only ask you to give us all the assistance you can in finding a man as big and strong as yourself. By George! you might be useful, if only to hold him! I suppose you yourself have no guess at the man?"
"I may have a guess," said the pale smith, "but it is not at a man." Then, seeing the scared eyes turn towards his wife on the bench, he put his huge hand on her shoulder and said: "Nor a woman either."
"What do you mean?" asked the inspector jocularly. "You don't think cows use hammers, do you?"
"I think no thing of flesh held that hammer," said the blacksmith in a stifled voice; "mortally speaking, I think the man died alone."
Wilfred made a sudden forward movement and peered at him with burning eyes.
"Do you mean to say, Barnes," came the sharp voice of the cobbler, "that the hammer jumped up of itself and knocked the man down?"
"Oh, you gentlemen may stare and snigger," cried Simeon; "you clergymen who tell us on Sunday in what a stillness the Lord smote Sennacherib. I believe that One who walks invisible in every house defended the honour of mine, and laid the defiler dead before the door of it. I believe the force in that blow was just the force there is in earthquakes, and no force less."
Wilfred said, with a voice utterly undescribable: "I told Norman myself to beware of the thunderbolt."
"That agent is outside my jurisdiction," said the inspector with a slight smile.
"You are not outside His," answered the smith; "see you to it," and, turning his broad back, he went into the house.
The shaken Wilfred was led away by Father Brown, who had an easy and friendly way with him. "Let us get out of this horrid place, Mr. Bohun," he said. "May I look inside your church? I hear it's one of the oldest in England. We take some interest, you know," he added with a comical grimace, "in old English churches."
Wilfred Bohun did not smile, for humour was never his strong point. But he nodded rather eagerly, being only too ready to explain the Gothic splendours to someone more likely to be sympathetic than the Presbyterian blacksmith or the atheist cobbler.
"By all means," he said; "let us go in at this side." And he led the way into the high side entrance at the top of the flight of steps. Father Brown was mounting the first step to follow him when he felt a hand on his shoulder, and turned to behold the dark, thin figure of the doctor, his face darker yet with suspicion.
"Sir," said the physician harshly, "you appear to know some secrets in this black business. May I ask if you are going to keep them to yourself?"
"Why, doctor," answered the priest, smiling quite pleasantly, "there is one very good reason why a man of my trade should keep things to himself when he is not sure of them, and that is that it is so constantly his duty to keep them to himself when he is sure of them. But if you think I have been discourteously reticent with you or anyone, I will go to the extreme limit of my custom. I will give you two very large hints."
"Well, sir?" said the doctor gloomily.
"First," said Father Brown quietly, "the thing is quite in your own province. It is a matter of physical science. The blacksmith is mistaken, not perhaps in saying that the blow was divine, but certainly in saying that it came by a miracle. It was no miracle, doctor, except in so far as man is himself a miracle, with his strange and wicked and yet half-heroic heart. The force that smashed that skull was a force well known to scientists—one of the most frequently debated of the laws of nature."
The doctor, who was looking at him with frowning intentness, only said: "And the other hint?"
"The other hint is this," said the priest. "Do you remember the blacksmith, though he believes in miracles, talking scornfully of the impossible fairy tale that his hammer had wings and flew half a mile across country?"
"Yes," said the doctor, "I remember that."
"Well," added Father Brown, with a broad smile, "that fairy tale was the nearest thing to the real truth that has been said today." And with that he turned his back and stumped up the steps after the curate.
The Reverend Wilfred, who had been waiting for him, pale and impatient, as if this little delay were the last straw for his nerves, led him immediately to his favourite corner of the church, that part of the gallery closest to the carved roof and lit by the wonderful window with the angel. The little Latin priest explored and admired everything exhaustively, talking cheerfully but in a low voice all the time. When in the course of his investigation he found the side exit and the winding stair down which Wilfred had rushed to find his brother dead, Father Brown ran not down but up, with the agility of a monkey, and his clear voice came from an outer platform above.
"Come up here, Mr. Bohun," he called. "The air will do you good."
Bohun followed him, and came out on a kind of stone gallery or balcony outside the building, from which one could see the illimitable plain in which their small hill stood, wooded away to the purple horizon and dotted with villages and farms. Clear and square, but quite small