The Antelope
The Court ruled that the international slave trade, though morally troubling, was not illegal under the law of nations because so many countries still allowed it, so ownership claims had to be judged case by case. It allowed Spain to reclaim a limited number of Africans it could prove it had owned, but rejected Portugal's claim entirely because no actual Portuguese owner ever came forward.
The Africans not claimed by a proven owner were ordered turned over to the United States rather than returned to slavery under an unproven foreign claim, though the decision did not free them outright or declare the slave trade unlawful.
How it got here: The Circuit Court for the District of Georgia ordered partial restitution to Spain and Portugal; the United States, on the Africans' behalf, appealed that decree to the Supreme Court.
The Case in Depth
What happened
A ship called the Antelope, flying a Spanish flag, was carrying captured Africans off the West African coast when it was seized by the Arraganta, a privateer manned out of Baltimore that had already plundered other vessels, including ones flying Portuguese colors. A U.S. revenue cutter later intercepted the renamed ship near Florida and brought it in. Spanish and Portuguese consuls both claimed the Africans aboard as property belonging to their countries' subjects, while the United States argued on the Africans' behalf that they should be freed.
The question before the Court
Could Spanish and Portuguese officials reclaim enslaved Africans found aboard a captured ship by claiming they were lawfully-owned property?
Why it matters
The ruling meant that hundreds of Africans' fates turned on which nation's paperwork could be proven in court, not on any recognition of their freedom as a matter of right. It set a precedent that the slave trade itself was not a violation of international law, leaving its legality up to each nation's own laws, and it left the Africans without proven owners in a still-uncertain legal status under U.S. control.
What changes now
The case returns to the Circuit Court for the District of Georgia, which must identify the ninety-three Africans covered by the proven Spanish claim, apply the reduced ratio the Court specified, and hand over the remainder to the United States rather than to either foreign claimant. This is a final merits decision on the legal principles, though further factual work by the lower court is required to carry out the apportionment the Court ordered.
What this does not decide
The Court explicitly did not decide the broader question of whether the slave trade is prohibited by the law of nations in general, noting the Court itself was divided and leaving that principle unsettled. It also did not order freedom for the Africans awarded to Spain, whose status as property was left intact under Spanish law.
How the Court got there
The legal reasoning, step by step
- The Court first asked whether the international slave trade itself violated the law of nations, the body of customary rules and general practice among sovereign states that courts use when no treaty controls. It concluded that because so many nations still legally permitted the trade and had done so for centuries without objection, the trade could not be called unlawful under that standard, however morally troubling it was.
- Because the trade was not unlawful under the law of nations, and only piracy or a specific treaty right could justify one nation seizing another nation's ship on the high seas, the Court held that the American privateer's seizure of the Spanish vessel gave the United States no automatic right to free the Africans found aboard; ownership still had to be resolved case by case under each claimant's own national law.
- Applying ordinary rules of proof, the Court held that a claimant seeking return of the Africans as property bore the burden of proving both that the trade was lawful under that claimant's own country's laws and the actual number and identity of the individuals taken, since men are not treated the same as ordinary cargo for proof-of-ownership purposes.
- Weighing the conflicting witness testimony about how many Africans came from the Spanish vessel, the Court found the Spanish claimants had reliably proven ownership of only ninety-three individuals, rather than the larger number they sought, and ordered the claim reduced accordingly.
- Turning to the Portuguese claim, the Court found no evidence identifying any actual Portuguese owner despite more than five years passing since the seizure, and treated this prolonged silence as strong evidence that no genuine Portuguese claimant existed and that the vessel's flag had been used to disguise the true, unlawful nationality of the traders.
- Having found no valid property claim proven for the remaining Africans, the Court concluded that they could not be handed over to either consul and instead had to be placed in the custody of the United States to be dealt with according to domestic law.
Doctrinal impact
Cases affected by this decision
Distinguishes The Amedie (1 Acton's Rep. 240)
Notes it turned on British law specifically forbidding the trade, unlike nations that still permitted it.
Reaffirms The Louis (2 Dodson's Rep. 238)
Relies on its reasoning that the right to search foreign ships for slaves exists only during war or by treaty.