McKee v. Gratz
Whether customary local practices of entering privately owned, unenclosed riverland to collect mussel shells established an implied license or right that could override the landowner's ability to exclude trespassers.
The Decision
Unanimous decision · Opinion by Oliver Wendell Holmes Jr.
Majority Opinion— Oliver Wendell Holmes Jr.concurring ↓
The Supreme Court affirmed the lower courts' decisions in favor of Gratz, holding that the property owner was entitled to an injunction preventing McKee and others from entering his land. The opinion was delivered by Justice Oliver Wendell Holmes Jr. and was unanimous.
Holmes acknowledged that the strict English common law rule regarding trespass onto private property — which treated any unauthorized entry as unlawful — had to be understood differently in the American context. He wrote memorably that 'the strict rule of the English common law as to entry upon a close must be taken to be mitigated by common understanding with regard to the large expanses of unenclosed and uncultivated land in many parts at least of this country.' In other words, Holmes recognized that American tradition and practical reality meant that people had long wandered onto open, unfenced private land for activities like hunting, fishing, and gathering without it being treated as serious trespassing.
However, Holmes made clear that this 'common understanding' created at most an implied license — a kind of informal, unspoken permission — rather than a permanent legal right. Crucially, such an implied license could be revoked by the landowner. Once Gratz made clear that he did not want people on his property and took legal steps to enforce that wish, whatever informal tolerance may have previously existed was effectively ended.
The Court emphasized that the determination of whether such customary practices existed and what legal weight they carried was a matter of local or state law and custom, not a universal national rule. Different regions might have different traditions regarding entry onto unenclosed land, and courts needed to look at the specific local context. But regardless of local tradition, the fundamental right of a property owner to assert control over his land and exclude unwanted visitors remained intact once that owner chose to exercise it.
Concurring Opinions
There were no separate concurring opinions filed in this case. The Court spoke unanimously through Justice Holmes's opinion.
Background & Facts
In the early twentieth century, freshwater mussel shells from the Mississippi River were commercially valuable, primarily because they were used in the pearl button manufacturing industry. People along the river had long made a practice of gathering these shells from riverbeds and riverbanks, often crossing onto privately owned land to reach productive shell-collecting spots.
The respondent, Gratz, owned islands and riverfront land along the Mississippi River in Illinois. McKee and other individuals regularly entered Gratz's property without permission to collect mussel shells. Gratz considered this trespassing and sought a court injunction — a legal order — to stop McKee and the others from entering his land.
McKee argued that there was a longstanding custom in the region allowing people to enter unenclosed, uncultivated land along waterways for purposes like fishing, hunting, and shell gathering, and that this tradition created an implied license to enter the property. In essence, McKee contended that because people had always done this and landowners had generally not objected, a kind of informal permission existed.
The lower federal courts sided with Gratz, the property owner, and granted the injunction to keep McKee and others off his land. McKee then brought the case to the United States Supreme Court, asking the justices to consider whether long-established local customs of entering unenclosed private land for shell gathering could override the property owner's right to exclude others.
The Arguments
McKee argued that a well-established tradition in the region allowed people to freely enter unenclosed and uncultivated private lands along the Mississippi River to gather mussel shells. He contended this longstanding custom created an implied license that the landowner could not simply revoke.
- There was a widespread and longstanding local practice of entering unenclosed riverlands to collect mussel shells, which amounted to an implied license.
- The strict English common law rule against trespass on private land should be relaxed in the context of the vast, open, unenclosed lands common in the United States.
- The landowner had not historically enclosed or cultivated the land in question, and the community had openly used it for shell gathering for a long period without objection.
Gratz argued that as the lawful owner of the land, he had the fundamental right to exclude others from his property. No local custom, however longstanding, could strip away that core property right, especially once he had clearly asserted his objection to the entry.
- Property ownership includes the right to exclude others, and no informal custom can permanently override that legal right.
- Even if an implied license had existed due to past tolerance, the landowner's explicit objection and pursuit of a legal injunction effectively revoked any such license.
- Local custom cannot create a legal easement or permanent right of entry on someone else's private property without meeting the formal legal requirements for such a right.