Though Sir Arthur Conan Doyle is best known for his detective stories, he also wrote other short stories that are masterpieces of mystery and suspense. In some of the stories, a supressed uneasiness gradually builds up and evolves into sheer terror; in others, the story line unexpectedly changes and comes to an unlikely conclusion. In "The Beetle-Hunter", a beginning doctor is employed on a strange errand to a coleopterist.