Black Man, The
In witchcraft tradition, the Black Man was the being that sealed the pacts between the Devil and the witch. He is not racially black but a man whose whole appearance is black, the absence of color. He may be Satan himself or one of his minions. Within the Lovecraft stories he may also be one of the personas of Nyarlathotep. The Black Man is mentioned in connection with Keziah Mason. The Black Man of the Haute Vienne Coven is mentioned in Joseph Curwen's correspondence.
("The Dreams in the Witch House," "The Case of Charles Dexter Ward")
([P.Rev.] "The Man of Stone")
See also "Nyarlathotep"