Introduction
Erebor raises a surprisingly difficult property law question. In The Hobbit, the Lonely Mountain is first the ancestral home of the Dwarves, then the lair of Smaug, and finally the object of Thorin Oakenshield’s claim to restoration.
This article considers that question through adverse possession law. It is a legal commentary exercise: if the facts of Erebor were tested by English principles of possession, time, and title, who would have the stronger claim?
Facts
Erebor was founded by Thráin I and later passed through the line of the Kings under the Mountain. Thorin I left Erebor, and the mountain appears to have remained abandoned for centuries. Thrór later returned to Erebor and made it again the seat of Dwarven power.
Smaug then attacked the mountain, killed many of its inhabitants, drove the survivors into exile, and remained inside Erebor for around 171 years. Thorin Oakenshield’s later claim is therefore both dynastic and moral: he is seeking to restore the House of Durin to its homeland. The legal question, however, is narrower than the moral one.
Legal Issue
The issue is whether Thrór, and later Smaug, could acquire title to Erebor by adverse possession. In simple terms, adverse possession can allow a person who is not the paper owner of land to acquire a possessory title where they possess the land for long enough, without the true owner’s permission, and where the true owner does not recover possession in time.
For this article, Erebor is treated as unregistered land. This is the closest fit not only because there is no Land Registry in Middle-Earth, but because Erebor is not presented as an ordinary settled community with an administrative system of conveyancing, records, or local landholding. A place such as Hobbiton might more plausibly have recognisable deeds, boundaries, and transfers, even if not a modern Land Registry. Erebor, by contrast, is a mountain kingdom, fortress, treasury, and ancestral homeland whose claims are shown through occupation, inheritance, conquest, and exile rather than formal registration.
Applicable Law
For unregistered land, the starting point is the Limitation Act 1980. Section 15 provides that an action to recover land generally cannot be brought after twelve years from the date on which the right of action accrued. Section 17 then provides that, once that limitation period has expired, the title of the paper owner is extinguished.
Adverse possession therefore depends on more than simply being present on land. The claimant must show factual possession and an intention to possess. In Powell v McFarlane (1977) 38 P & CR 452, factual possession was described as requiring a sufficient degree of physical custody and control. In JA Pye (Oxford) Ltd v Graham [2002] UKHL 30; [2003] 1 AC 419, the House of Lords confirmed that the intention required is an intention to possess, not necessarily an intention to own.
This distinction matters. A person may intend to possess land by excluding the world at large, even if they do not have a refined legal theory of ownership. The question is whether they exercised control and intended to possess the land for themselves, not whether they could explain their title in legal language.
Thrór’s Claim
Thrór’s claim is the easier one. If Erebor had been abandoned for around 380 years after Thorin I left, the earlier paper title would not necessarily have disappeared simply because no one was actively using the mountain. Abandonment alone is not the same as adverse possession. The stronger point is that, when Thrór returned, he appears to have taken actual, exclusive control of Erebor.
On those facts, Thrór appears to have had factual possession. He and his people lived in Erebor, controlled it, worked its wealth, and excluded others. He also had the necessary intention to possess. His conduct was not casual use of land; it was the deliberate reoccupation of the mountain as a home and seat of rule.
If the twelve-year period under section 15 of the Limitation Act 1980 ran without any superior owner recovering possession, section 17 would extinguish the earlier title. Under English adverse possession principles, Thrór would therefore have a strong possessory title to Erebor.
All of this assumes that Thrór had not already inherited title from his predecessors. If he had, the analysis would shift away from adverse possession and towards inheritance, succession, and the transmission of title.
Smaug’s Claim
Smaug’s claim is more uncomfortable, but legally important. He entered by violence and wrongdoing. He was not a deserving claimant, and Tolkien plainly does not present his occupation as morally legitimate. However, adverse possession is not a moral reward. It is a doctrine concerned with possession, exclusion, and the running of time.
Smaug had factual possession. He physically controlled Erebor, occupied it as his lair, guarded the treasure, and excluded the Dwarves and the outside world for around 171 years. He also had an intention to possess. He did not merely pass through the mountain; he treated it as his own place of occupation and control.
The violence of Smaug’s entry does not automatically prevent adverse possession. The law does not usually ask whether the original entry was morally justified before deciding whether possession and limitation have operated. That does not mean the violence is irrelevant in every sense. Separate civil or criminal consequences could arise from the attack, killing, destruction, trespass, or conversion of property. The point is only that those wrongs do not, by themselves, necessarily stop time from running for adverse possession.
On this analysis, if no one effectively recovered possession from Smaug within the limitation period, Smaug could acquire the better legal claim to Erebor as land. This conclusion is unsettling, but it follows from the logic of adverse possession: law may protect long control even where the story’s moral sympathy lies elsewhere.
Counterarguments
There are several limits to this analysis. First, it is not obvious that a dragon could hold legal title. English land law assumes a legal person, such as a human being, company, trustee, or other recognised legal entity. If Smaug could not be treated as legally capable of holding title, the analysis would have to change.
Second, Erebor is not only land. It is a fortress, a treasury, a kingdom, and a homeland. Adverse possession is a doctrine of land law. It does not neatly answer who has rightful sovereignty over a people, who owns every item of treasure, or who has moral authority to rule.
Third, the law does not map cleanly onto Tolkien’s world. Middle-Earth has kingship, inheritance, conquest, exile, oaths, and ancient claims that do not fit comfortably into modern property law. The exercise is useful because it clarifies the legal doctrine, not because it solves Tolkien’s world on its own terms.
Finally, legal possession is not the same thing as moral legitimacy. Smaug may have the stronger adverse possession argument after more than a century and a half of exclusive control, while Thorin may still have the stronger moral and narrative claim. This tension is exactly what makes the example interesting.
Conclusion
Under a simplified application of English adverse possession law, Thrór could likely establish a strong claim to Erebor after returning to and occupying the abandoned mountain. However, Smaug’s later occupation creates the harder conclusion. If Erebor is treated as land, if Smaug can be treated as capable of holding title, and if no effective recovery occurred within the limitation period, Smaug may have acquired the better possessory claim.
This does not make Smaug rightful in any moral sense. It simply shows how adverse possession can separate legal title from desert. Thorin’s return may be the restoration the story asks us to support, but English land law would ask a colder question: who possessed the land, with the intention to possess, for the required period of time?
Disclaimer
This article is a simplified legal commentary exercise for Lore and Law. It is not legal advice and should not be relied on as a statement of the full law of adverse possession.
References
- Powell v McFarlane (1977) 38 P & CR 452.
- JA Pye (Oxford) Ltd v Graham [2002] UKHL 30; [2003] 1 AC 419.
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