The Complete Father Brown Mysteries: By G. K. Chesterton Father Brown solves mysteries and crimes using his intuition and keen understanding of human nature. Chesterton loosely based him on the Rt Rev. Msgr. John O'Connor (1870–1952), a parish priest in Bradford, who was involved in Chesterton's conversion to Catholicism in 1922 Chesterton portrays Father Brown as a short, stumpy Roman Catholic priest, with shapeless clothes, a large umbrella, and an uncanny insight into human evil. In "The Head of Caesar" he is "formerly priest of Cobhole in Essex, and now working in London". He makes his first appearance in the story "The Blue Cross" published in 1910 and continues to appear throughout forty-eight short stories in five volumes, with two more stories discovered and published posthumously, often assisted in his crime-solving by the reformed criminal M. Hercule Flambeau.