Father Brown is a fictional Roman Catholic priest and amateur sleuth created in the early 20th century by English novelist G. K. Chesterton. Father Brown is featured in a series of short stories where he solves mysteries and crimes using his intuition and keen understanding of human nature. The character was loosely based by Chesterton on Father 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" and continues to appear throughout five volumes of short stories, often assisted in his crime-solving by the reformed criminal M. Hercule Flambeau.