“But what could it mean?” demanded the diner opposite.

“I can’t conceive,” said Brown; “I don’t understand this Hirsch affair at all. As long as it was only the left drawer instead of the right, and red ink instead of black, I thought it must be the chance blunders of a forger, as you say. But three is a mystical number; it finishes things. It finishes this. That the direction about the drawer, the colour of ink, the colour of envelope, should none of them be right by accident, that can’t be a coincidence. It wasn’t.”

“What was it, then? Treason?” asked Flambeau, resuming his dinner.

“I don’t know that either,” answered Brown, with a face of blank bewilderment. “The only thing I can think of.... Well, I never understood that Dreyfus case. I can always grasp moral evidence easier than the other sorts. I go by a man’s eyes and voice, don’t you know, and whether his family seems happy, and by what subjects he chooses—and avoids. Well, I was puzzled in the Dreyfus case. Not by the horrible things imputed both ways; I know (though it’s not modern to say so) that human nature in the highest places is still capable of being Cenci or Borgia. No—, what puzzled me was the sincerity of both parties. I don’t mean the political parties; the rank and file are always roughly honest, and often duped. I mean the persons of the play. I mean the conspirators, if they were conspirators. I mean the traitor, if he was a traitor. I mean the men who must have known the truth. Now Dreyfus went on like a man who knew he was a wronged man. And yet the French statesmen and soldiers went on as if they knew he wasn’t a wronged man but simply a wrong ‘un. I don’t mean they behaved well; I mean they behaved as if they were sure. I can’t describe these things; I know what I mean.”

“I wish I did,” said his friend. “And what has it to do with old Hirsch?”

“Suppose a person in a position of trust,” went on the priest, “began to give the enemy information because it was false information. Suppose he even thought he was saving his country by misleading the foreigner. Suppose this brought him into spy circles, and little loans were made to him, and little ties tied on to him. Suppose he kept up his contradictory position in a confused way by never telling the foreign spies the truth, but letting it more and more be guessed. The better part of him (what was left of it) would still say: ‘I have not helped the enemy; I said it was the left drawer.’ The meaner part of him would already be saying: ‘But they may have the sense to see that means the right.’ I think it is psychologically possible—in an enlightened age, you know.”

“It may be psychologically possible,” answered Flambeau, “and it certainly would explain Dreyfus being certain he was wronged and his judges being sure he was guilty. But it won’t wash historically, because Dreyfus’s document (if it was his document) was literally correct.”

“I wasn’t thinking of Dreyfus,” said Father Brown.

Silence had sunk around them with the emptying of the tables; it was already late, though the sunlight still clung to everything, as if accidentally entangled in the trees. In the stillness Flambeau shifted his seat sharply—making an isolated and echoing noise—and threw his elbow over the angle of it. “Well,” he said, rather harshly, “if Hirsch is not better than a timid treason-monger...”

“You mustn’t be too hard on them,” said Father Brown gently. “It’s not entirely their fault; but they have no instincts. I mean those things that make a woman refuse to dance with a man or a man to touch an investment. They’ve been taught that it’s all a matter of degree.”