I first discovered Chesterton when I was twelve and I discovered the Father Brown stories in the Morningside Library. That is the posh end of Edinburgh, as anyone who has read The Prime of Miss Jean Brodie will know. I first read The Wisdom of Father Brown, then The Innocence of Father Brown soon after. They are the two best Father Brown books, but The Incredulity of Father Brown is not far behind, containing the story “The Dagger with Wings”, with the devil-worshipping figure of John Strake, who wears a cloak too long for him to walk in because he…