Every direct reference made by REH to Acheron (with the just possible, indirect exception of the "Hall of the Dead" fragment) is connected in some way with his writing of the Conan novel, The Hour of the Dragon. We might as well start at the start, with the earliest known reference that REH ever made to Acheron (so far published). All quotes are from The Bloody Crown of Conan (Del Rey)...
From the synopsis:"The mummy (of Xaltotun) was that of a sorcerer of long ago, an Hyborian of a kingdom which had been destroyed by the Nemedians, Aquilonians and Argosseans. The name of this kingdom was Acheron, and its capital city was called Python. Many centuries before the people of Acheron, Hyborians more highly civilized than their neighbors to the east and the west, had been lords of an empire which had included what was later southern Nemedia and Brythunia, most of Corinthia, most of Ophir, western Koth and the western lands of Shem, northern Argos and eastern Aquilonia. With the overthrow and destruction of Acheron by its ruder western neighbors, their greatest sorcerer fled to Stygia, living there until poisoned by a Stygian priest of Set the Old Serpent." (p.335)
Hmmm... Robert E. Howard plainly states that the Acheronians were Hyborians. It looks like he conceived of Acheron as a kind of sorcerous Roman Empire, precociously civilized, enslaving far and wide, until thrown down by their "rude" barbaric kin from the west. Why did de Camp/Carter change the Acheronians to Stygians? Sure, the "Achies" worshipped Set, but the Kothians worshipped Ishtar without becoming Shemites.
Xaltotun: "was a tall man with quick strong hands and strange magnetic eyes and thick black hair." (p.335) Xaltotun said that "before he could regain his full magical power, they must steal for him the jewel called the Heart of Ahriman, which was kept in a secret place in the kingdom of Aquilonia. This had been taken from him when Python fell, and so he had been forced to flee to Stygia. In his own heart the wizard planned to restore the ancient kingdom of Acheron. The descendants of Acheron were more plentiful than men supposed, dwelling in the fastness of the hills, in communities in the great cities, and scattered throughout the kingdom as priests, menials, secretaries, and scribes." (p.335-336)
We see here that Howard's basic physical conception of Xaltotun stayed true from the beginning of the the writing process. The wizard's ultimate objectives stayed the same as well. The role of the Heart is slightly different, though its basic evil character is never in doubt.
Let's move on to the published version of The Hour of the Dragon (TBCoC, Del Rey)...
Xaltotun:was "a tall, lusty man, naked, white of skin, and dark of hair and beard". (p.85) He had "black wavy locks that fell to his shoulders." (p.86) The same description from the synopsis. He "was a high priest of Set in Python", and spoke "Nemedian with a curious, archaic accent." (p.86) So, in the days of Acheron, Xaltotun learned to speak "Nemedian", which merely sounds "archaic" after three thousand years. Xaltotun had a "lion-like head". (p.88)
Acheron: Encompassed at least part of the territories that would later become "Aquilonia, Nemedia, and Argos...". "The older kingdoms of Ophir, Corinthia and western Koth, which had been subject to the kings of Acheron, regained their independence with the fall of the empire." "In the hills small groups of folk still boast descent from Acheron" (according to Orastes). (p.88)
The "Younger Kingdoms":"rose on the imperial ruins and waxed great", according to Orastes. (p.88) "Younger", not "Hyborian" kingdoms. Does Xaltotun ever refer to the (Hyborian) "barbarians" as "Hyborians"? He instantly notices that Conan "is no Hyborian" (p.90), demonstrating that he's familiar with the term (and the physical type) immediately after resurrection.
Xaltotun:claimed that he had seen barbarian "heads piled to make a pyramid in the great square in Python when the kings returned from the west with their spoils and naked captives." Evidently, Acheron, like other Hyborian nations, kept kingship and high-priestship separate.
Well, it's getting late and there's plenty of meat to chew on above. Feel free to comment.

















