And in truth Father Brown did keep near the eccentric baronet, and did actually meet him on more than one occasion, with the utmost politeness on both sides. For the baronet, in spite of his years, was very vigorous and a great walker, and could often be seen stumping through the village, and along the country lanes. Only the day after their arrival Father Brown, coming out of the inn on to the cobbled marketplace, saw the dark and distinguished figure stride past in the direction of the post office. He was very quietly dressed in black, but his strong face was even more arresting in the strong sunlight; with his silvery hair, swarthy eyebrows and long chin he had something of a reminiscence of Henry Irving or some other famous actor. In spite of his hoary hair, his figure as well as his face suggested strength, and he carried his stick more like a cudgel than a crutch. He saluted the priest, and spoke with the same air of coming fearlessly to the point which had marked his revelations of yesterday.
“If you are still interested in my son,” he said, using the term with an icy indifference, “you will not see very much of him. He has just left the country. Between ourselves, I might say fled the country.”
“Indeed,” said Father Brown with a grave stare.
“Some people I never heard of, called Grunov, have been pestering me, of all people, about his whereabouts,” said Sir John; “and I’ve just come in to send off a wire to tell them that, so far as I know, he’s living in the Poste Restante, Riga. Even that has been a nuisance. I came in yesterday to do it, but was five minutes too late for the post office. Are you staying long? I hope you will pay me another visit.”
When the priest recounted to the lawyer his little interview with old Musgrave in the village, the lawyer was both puzzled and interested.
“Why has the Captain bolted?” he asked. “Who are the other people who want him? Who on earth are the Grunovs?”
“For the first, I don’t know,” replied Father Brown. “Possibly his mysterious sin has come to light. I should rather guess that the other people are blackmailing him about it. For the third, I think I do know. That horrible fat woman with yellow hair is called Madame Grunov, and that little man passes as her husband.”
The next day Father Brown came in rather wearily, and threw down his black bundle of an umbrella with the air of a pilgrim laying down his staff. He had an air of some depression. But it was as it was so often in his criminal investigations. It was not the depression of failure, but the depression of success.
“It’s rather a shock,” he said in a dull voice; “but I ought to have guessed it. I ought to have guessed it when I first went in and saw the thing standing there.”
“When you saw what?” asked Granby impatiently.
“When I saw there was only one suit of armour,” answered Father Brown.
There was a silence during which the lawyer only stared at his friend, and then the friend resumed.
“Only the other day I was just going to tell my niece that there are two types of men who can laugh when they are alone. One might almost say the man who does it is either very good or very bad. You see, he is either confiding the joke to God or confiding it to the Devil. But anyhow he has an inner life. Well, there really is a kind of man who confides the joke to the Devil. He does not mind if nobody sees the joke; if nobody can safely be allowed even to know the joke. The joke is enough in itself, if it is sufficiently sinister and malignant.”
“But what are you talking about?” demanded Granby. “Whom are you talking about? Which of them, I mean? Who is this person who is having a sinister joke with his Satanic Majesty?”
Father Brown looked across at him with a ghastly smile.
“Ah,” he said, “that’s the joke!”
There was another silence, but this time the silence seemed to be rather full and oppressive than merely empty; it seemed to settle down on them like the twilight that was gradually turning from dusk to dark. Father Brown went on speaking in a level voice, sitting stolidly with his elbows on the table.
“I’ve been looking up the Musgrave family,” he said. “They are vigorous and long-lived stock, and even in the ordinary way I should think you would wait a good time for your money.”
“We’re quite prepared for that,” answered the solicitor; “but anyhow it can’t last indefinitely. The old man is nearly eighty, though he still walks about, and the people at the inn here laugh and say they don’t believe he will ever die.”
Father Brown jumped up with one of his rare but rapid movements, but remained with his hands on the table, leaning forward and looking his friend in the face.
“That’s it,” he cried in a low but excited voice. “That’s the only problem. That’s the only real difficulty. How will he die? How on earth is he to die?”
“What on earth do you mean?” asked Granby.
“I mean,” came the voice of the priest out of the darkening room, “that I know the crime that James Musgrave committed.”
His tones had such a chill in them that Granby could hardly repress a shiver; he murmured a further question.
“It was really the worst crime in the world,” said Father Brown. “At least, many communities and civilizations have accounted it so. It was always from the earliest times marked out in tribe and village for tremendous punishment. But anyhow, I know now what young Musgrave really did and why he
