The Poe Shadow October 8, 1849. He had previously corresponded with Poe about providing legal support for a new publication, "The Stylus". Clark feels obliged to look into the mysterious circumstances surrounding Poe's death, despite protests from his fiancée Hattie Blum and his friend Peter Stuart. Clark's journey takes him to Paris to seek out the real-life inspiration for Poe's character C. Auguste Dupin, a man of intellect who could help unravel the mystery. After eliminating several possibilities, he meets Baron C.A. Dupin, a famous lawyer, and a detective with a similar name, Auguste Duponte. After a confrontation with the Baron Dupin and
Dupin cyclide Dupin cyclide In mathematics, a Dupin cyclide or cyclide of Dupin is any geometric inversion of a standard torus, cylinder or double cone. In particular, these latter are themselves examples of Dupin cyclides. They were discovered by (and named after) Charles Dupin in his 1803 dissertation under Gaspard Monge. The key property of a Dupin cyclide is that it is a channel surface (envelope of a one-parameter family of spheres) in two different ways. This property means that Dupin cyclides are natural objects in Lie sphere geometry. Dupin cyclides are often simply known as "cyclides", but the latter term is