Eric John Stark is a character created by the science fiction author Leigh Brackett. Stark is the hero of a series of pulp adventures set in a time when the Solar System has been colonized. His origin-story shares some characteristics with feral characters such as Mowgli and Tarzan; his adventures take place in the shared space opera planets of 1940s and 1950s science fiction.
Stark was born on Mercury. His parents were employees of the mineral extraction company Mercury Metals and Mining. After his parents died in a cave-in caused by a quake, Stark was adopted by a tribe of Mercurian aborigines who are described as hairy and possessing snouts. They gave him the name N'Chaka, meaning "the man without a tribe". He believed himself to be one of them, rather than a human, and endured their rigorous way of life in the Mercurian Twilight Belt, surviving by hunting rock-lizards.
Before Stark was fully grown, another group of human miners exterminated his tribe, captured Stark and imprisoned him in a cage. They would ultimately have killed him if he had not been rescued by the police official Simon Ashton, who raised Stark to adulthood.
The stories of the adult Stark are fast-paced adventures, but Brackett manages to insert more pathos than most authors. Because of his background, Stark is keenly aware of the injustices visited on the planetary "primitives" by the colonialist Earth, and tends to side with them against official bodies. At the opening of the story in which he first appears, Stark is evading a twenty-year sentence placed on him for running guns to a Venusian native group that has been resisting Terran colonizers.
A point about Stark's physical appearance which has been studiously ignored by every one of his illustrators until the James Ryman's covers from the Paizo Publishing Planet Stories line [1]: years of exposure to heightened sunlight on the planet Mercury has permanently given Stark very dark, almost black skin. His skin is "almost as dark as his black hair" and an antagonist refers to him scornfully as a "great black ape". The darkness of Stark's skin is reiterated in Enchantress of Venus. Brackett's other Mercurian characters also have black skin (e.g. Jaffa Storm in The Nemesis from Terra).