"A Creature of the Twilight" concerns the adventures in Africa of a reactionary, romantic mercenary Mandred Arcane, a self-proclaimed mixture of Machiavelli and Sir Lancelot, who is an anachronistic survival of the Victorian Age who does not belong in the modern world and yet defiantly still exists, making him the "creature of the twilight". Kirk has Arcane write his pseudo-memoir in a consciously Victorian style to underline that he does not belong in the 1960s. Arcane is both a dapper intellectual and a hardened man of action, an elderly man full of an unnatural vigor, who is hired by the son of the assassinated Sultan to put down a Communist rebellion in the fictional African nation of Hamnegri, which he does despite overwhelming odds. In 1967, Kirk published a short story "Belgrummo's Hell" about a clever art thief who unwisely tries to rob the estate of the ancient Scottish warlock, Lord Belgrummo, who is later revealed to be Arcane's father. In another short story published in the same collection, "The Peculiar Demesne of Archvicar Gerontion" concerned a wizard, Archvicar Gerontion, who tries to kill Arcane by casting deadly spells.