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The Incredulity of Father Brown and even confessed his crimes; only it would be truer to say that he boasted of his victories. Compared to the fact that he had rounded off his life's work with the last Aylmer lying dead, everything else, including existence itself, seemed to be indifferent to him.

"The man is a sort of monomaniac," said Father Brown. "He is not interested in any other matter; not even in any other murder. I owe him something for that; for I had to comfort myself with the reflection a good many times this afternoon. As has doubtless occurred to you, instead of weaving all that wild but ingenious romance about winged vampires and silver bullets, he might have put an ordinary leaden bullet into me, and walked out of the house. I assure you it occurred quite frequently to me."

"I wonder why he didn't," observed Boyne. "I don't understand it; but I don't understand anything yet. How on earth did you discover it, and what in the world did you discover?"

"Oh, you provided me with very valuable information," replied Father Brown modestly, "especially the one piece of information that really counted. I mean the statement that Strake was a very inventive and imaginative liar, with great presence of mind in producing his lies. This afternoon he needed it; but he rose to the occasion. Perhaps his only mistake was in choosing a preternatural story;