Daerndir, the
Barrow-wights are
evil spirits sent by the
Witch-king of Angmar to infest the barrow-downs, as you, Ithilethiel, and Squint-eyed Southerner have all pointed out.
I think these spirits are a some mix of weak but wicked
Maiar (
Umaiar, of whom the strongest was
Sauron, then the
Balrogs; but these are much weaker) and the
fëar or spirits of wicked
Elves.
Particularly in the
First Age, there were indeed wicked Elves. Some were enslaved by
Morgoth and fell into wickedness; some became wicked as time went on. (There is a thread on Eöl nearby, for instance: Eöl tried to kill his own son, Maeglin, as
Denethor tried to kill his son
Faramir.)
In
Morgoth’s Ring, “Of Re-Birth and Other Dooms of Those that Go to
Mandos”,
Tolkien writes that
The fëa [i.e., soul, in this case of an Elf] … cannot be [forced to go] to Mandos. It is summoned; and the summons … may be refused. … [I]n the first years of the Elves, refusal of the summons to Mandos and the
Halls of Waiting was, the Eldar say, frequent. … [W]hile Morgoth was in
Arda, or … Sauron after him; … the unbodied fëa would flee in terror of the Shadow to any refuge – unless it were already committed to the Darkness and passed then into its dominion. In like manner even of the Eldar some who had become corrupted refused the summons, and then had little power to resist the counter-summons of Morgoth.
…[M]ore and more of the Elves … who linger in
Middle-earth now refuse the summons of Mandos, and wander houseless in the world, unwilling to leave it and unable to inhabit it… Not all of these are kindly or unstained by the Shadow. Indeed the refusal of the summons is in itself a sign of taint.
It is therefore a foolish and perilous thing, besides being a wrong deed forbidden justly by the appointed Rulers of Arda, if the Living seek to commune with the Unbodied, though the houseless may desire it, especially the most unworthy among them. … Some were enslaved by the
Dark Lord and do his work still, though he himself is gone. They will not speak truth or wisdom. To call on them is folly. To attempt to master them and to make them servants of one’s own will is wickedness. Such practices are of Morgoth; and the necromancers are of the host of Sauron his servant.
…The wicked among them will take bodies… The peril of communing with them is, therefore, not only the peril of being deluded… For one of the hungry Houseless … may seek to eject the fëa [of a Man] from its body; and in the contest for mastery the body may be gravely injured, even if it he not wrested from its rightful habitant. Or the Houseless may plead for shelter, and if it is admitted, then it will seek to enslave its host and use both his will and his body for its own purposes. It is said that Sauron did these things, and taught his followers how to achieve them.
Presumably this passage was written in the
Fourth Age, for Sauron is no longer a threat to the Houseless (or Unbodied) Elves who have died; but note that in “The Window on the West”, Faramir says that, “I deem it perilous now for mortal man to willfully seek out the Elder People.”
The passage indicates that:
- There were at first a lot of Elves who refused the summons of Mandos when they died. The spirits or fëar of these Elves went willingly or unwillingly to Morgoth.
- There were some wicked Elves who willingly went into the Darkness.
- The more wicked of the Unbodied or Houseless Elves had the power to possess the body (hröa, though that word is not used here) of a Man.
- Forcing the spirits of these evil Elves to do your will is necromancy (literally “black magic”; the Sindarin word Tolkien uses is Morgul), the expertise of Sauron the Necromancer, who taught this to his followers.
The
Witch-king was definitely one of Sauron’s followers. He did indeed summon these evil spirits into the bodies in the barrows.
But why? Well, if you look in Appendix A in
Return of the King, you’ll find that in 1409 of
the Third Age, the Witch-king led the army of
Angmar and his Hillmen allies who had taken over Rhudaur in an attack against Cardolan and Arthedain. They burned and destroyed
Amon Sûl,
Weathertop, in an attempt to take its
palantír, the chief and most powerful palantír in Middle-earth. The Witch-king failed to take the palantír. Then it says, “A remnant of
the faithful among the Dúnedain of Cardolan also held out in Tyrn Gorthad (the Barrowdowns), or took refuge in the [Old] Forest behind.” The last Prince of Cardolan was killed, along with his family it seems, and they were buried among the barrows: in fact, this was the very barrow in which
Frodo and his friends were held captive.
The barrows are made of stone and quite sturdy. They served the Dúnedain as little
fortresses atop the downs, and so were more easily defended that the surrounding territory. That was a problem for Angmar and helped break up and slow down the invasion, giving
Círdan and
Elrond time to launch counter-attacks.
So to prevent this from happening again, the Witch-king infested the barrows with “evil spirits”. Appendix A says,
In the days of Argeleb II the plague [that had afflicted Gondor and killed King Telemnar and his children] came into
Eriador …, and most of the people of Cardolan perished. ... It was at this time that an end came of the Dúnedain of Cardolan, and evil spirits out of Angmar and Rhudaur entered into the deserted mounds and dwelt there.
This was 129 years after the first by Angmar upon the Northern Dúnedain, in 1636.
Presumably there was more skirmishing and border warfare, but in the winter of 1974, the Witch-king attacked again. This time there were fewer Dúnedain to oppose him, and they could no longer use the barrows as a defensive barrier to slow his forces or break up his attack. Elrond and Círdan again launched counter-attacks, this time with the assistance of an expeditionary force from
Gondor, but it was too late: the northern kingdom was lost, and the Dúnedain too few to reconstitute it.
Infesting the barrow-downs had another effect, too: It demoralized the Dúnedain. Appendix A says that
[T]he mounds of Tyrn Gorthad, … the Barrowdowns …, are very ancient, and … were built in the … First Age by the forefathers of the
Edain, before they crossed the
Blue Mountains into
Beleriand… Those
hills were therefore revered by the Dúnedain after their return; and there many of their lords and
Kings were buried.
By the way, since the last Prince of Cardolan was killed in the war of 1409 and himself buried in the Barrow-downs, the Kings of Arthedain once more became the rulers of Cardolan; but even before that, Cardolan had allied with Arthedain against Angmar and its usurpers in Rhudaur.
One last point: Look again at the sentence, “A remnant of the faithful among the Dúnedain of Cardolan also held out in Tyrn Gorthad”. Do you remember in “The Window on the West” that Faramir says, “It is not said that evil arts were ever practiced in Gondor, or that [Sauron] was ever named in honour there;” indicating that Sauron was “named in honour” among some of the other
Númenóreans in Middle-earth. And in fact, in the paragraph just preceding that, he said, “The
Men of
Númenor were settled far and wide [in Middle-earth], but … the most part … fell into evil… Many became enamored of the … black arts; …
some fought among themselves, until they were conquered in their weakness by the wild men.”
This last phrase, “some fought among themselves, until they were conquered in their weakness by the wild men,” is exactly what happened in
Arnor, where Rhudaur was “conquered in [its] weakness by wild men.” These Hillmen were allies of Angmar, and they did worship Sauron, or held some religious affiliation with him: certainly their allies in Angmar did!
No doubt Faramir is describing the moral and spiritual rot that afflicted and overthrew Númenor in the second half of the
Second Age, but he may also be describing the situation in Arnor. Otherwise, Tolkien would not say, “a remnant of the
faithful among the Dúnedain of Cardolan”, but rather, “a remnant of the
survivors among the Dúnedain of Cardolan”.
Based on this, it’s my opinion concerning the ruin and loss of Arnor that some of the Dúnedain of Arnor, particularly in Rhudaur but also in Cardolan, turned to Darkness, and Arthedain was unable to stand alone; but the barrows were unquestionably as you say, Daerndir,
a … deserted place where evil spirits dwell inside … barrows originally sent there by the Witch King to prevent the area from being repopulated and keeping the kingdom of Cardolan from restoring
I don’t know that the Barrow-wights are
mobile: they seem fixed to the barrows:
Bombadil scatters the treasure, the gold, to break the spell that binds them to the barrow he breaks into in order to free Frodo; but there were surely other things, too: the
Rangers kept
wargs out of Eriador, and they hunted down and killed
trolls and
orcs that invaded.
But there is no reference that I recall to any other evil spirits other than those inhabiting the barrows as barrow-wights, and these were “a day’s march” from
Bree.