According to Wikipedia: "Erckmann-Chatrian was the name used by French authors Émile Erckmann (1822-1899) and Alexandre Chatrian (1826-1890), nearly all of whose works were jointly written. Both Erckmann and Chatrian were born in the département of Moselle, in the Lorraine region in the extreme north-east of France. They specialised in military fiction and ghost stories in a rustic mode, applying to the Vosges mountain range and the Alsace-Lorraine region techniques inspired by story-tellers from the Black Forest. Life-long friends who first met in the spring of 1847, they finally quarreled during the mid-1880s, after they did not produce any more stories jointly. During 1890 Chatrian died, and Erckmann wrote a few pieces under his own name. Tales of supernatural horror by the duo that are famous in English include "The Wild Huntsman" (tr. 1871), "The Man-Wolf" (tr. 1876) and "The Crab Spider.