The Incredulity of Father Brown
careering in a huge machine past the window, at the very moment of the murder, and nobody noticed it; unless, perhaps, it were the notion that a respectable old gentleman should play at Red Indians with a bow and arrow behind the bushes, to kill somebody he could have killed in twenty much simpler ways. But I had to find out if they had had anything to do with it; and so I had to accuse them in order to prove their innocence."
"And how have you proved their innocence?" asked Blake, the lawyer, leaning forward eagerly.
"Only by the agitation they showed when they were accused," answered the other.
"What do you mean, exactly?"
"If you will permit me to say so," remarked Father Brown, composedly enough, "I did undoubtedly think it my duty to suspect them and everybody else. I did suspect Mr. Crake and I did suspect Captain Wain, in the sense that I considered the possibility or probability of their guilt. I told them I had formed conclusions about it; and I will now tell them what those conclusions were. I was sure they were innocent, because of the manner and the moment in which they passed from unconsciousness to indignation. So long as they never thought they were accused, they went on giving me materials to support the accusation, They practically explained to me how they might have committed the crime. Then they suddenly realized with a shock
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