Guille v. Swan
19 Johns. 381 (1822)
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Rule of Law:
A person is liable for damages caused by the foreseeable actions of third parties that are a natural and ordinary consequence of the person's own act, even if that initial act was lawful.
Facts:
- Guille ascended in a balloon.
- He descended involuntarily into S.'s private garden.
- Guille, in a situation of peril, called for help.
- A large crowd was attracted to the garden by the spectacle of the balloon and Guille's situation.
- The crowd broke through the garden's enclosures and trampled S.'s vegetables and flowers, causing significant damage.
Procedural Posture:
- S. sued Guille in a court of first instance for trespass and damages to his garden.
- The trial court entered a judgment in favor of S., holding Guille liable.
- Guille, the defendant below, appealed the judgment to the present court, becoming the plaintiff in error.
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Issue:
Is a person who descends in a balloon into a private garden liable for the damage done to the garden not only by his own landing but also by a crowd of people attracted to the scene by the spectacle?
Opinions:
Majority - Spencer, Ch. J.
Yes. A person is liable for an injury caused by their act, even if unintentional, if that act is the immediate cause of the injury. To hold a person liable for the acts of others, it must be shown that the individual's act ordinarily and naturally produced the acts of the others. Here, Guille's descent under such circumstances would ordinarily and naturally draw a crowd, either from curiosity or a desire to help. He should have foreseen this consequence. By placing himself in a perilous situation that invited assistance and attracted onlookers, his actions were equivalent to a direct request for the crowd to enter the garden, making him the 'author of the mischief' and responsible for all the resulting damage.
Analysis:
This case is a foundational tort law decision establishing a key principle of proximate cause and foreseeability. It extends liability beyond the defendant's direct physical actions to include the consequential, foreseeable actions of third parties. The ruling demonstrates that even a lawful act, like ballooning, can create liability if it foreseeably results in harm. This principle, that one is responsible for the natural and probable consequences of one's acts, has become a cornerstone of modern negligence and trespass analysis.

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