On May 29, 1925, from a makeshift camp deep in the Brazilian Amazon named for a horse that had died there five years earlier, veteran explorer Percy Fawcett sent one final letter home: the party was in good spirits, he wrote, pushing into unexplored territory in search of a lost civilization he called "Z." Neither Fawcett, his son Jack, nor Jack's friend Raleigh Rimell were ever heard from again. Fawcett had left explicit instructions that no rescue mission should be sent if he failed to return, calling the risk too great. People searched anyway, for decades, and some of them died doing it.
Background: A Career Built on Real Skill, Bent Toward a Fantasy
Percival Harrison Fawcett was born in 1867 in Devon, England, and trained as a surveyor with the Royal Geographical Society, building a genuine reputation as one of the most capable and physically tough explorers of his era. Between 1906 and 1911, he undertook serious, respected work mapping the disputed border between Bolivia and Brazil, and went on to complete seven separate expeditions across the Amazon Basin between 1906 and 1924. Over the course of that work, Fawcett developed an increasingly fixed belief that an advanced, complex civilization had once existed deep in Brazil's Mato Grosso region, a place he referred to, for convenience, as "Z." His theory drew on several threads: centuries-old Spanish accounts of a golden city called El Dorado, dating back to the 1540s; a mysterious eighteenth-century document known as Manuscript 512, held in Rio de Janeiro's National Library, describing ruins explorers claimed to have found; and, more unusually, Fawcett's own genuine interest in occult and Theosophical ideas. He was given a carved black basalt idol by novelist H. Rider Haggard, which Fawcett came to believe was somehow connected both to Z and to the lost continent of Atlantis.
The Final Expedition
Fawcett's last journey, financed by a London press syndicate known as "the Glove," began in April 1925. He deliberately kept the party small: his eldest son Jack, Jack's close friend Raleigh Rimell, Brazilian porters, two horses, two dogs, and eight mules. Their route took them toward the region around the Xingu River, and their last confirmed communication was the May 29 letter sent from what Fawcett called Dead Horse Camp, a site named for a horse lost there on a previous 1920 expedition. After that letter, the trail simply stops. Fawcett had specifically instructed that no search party be sent after him if he vanished, judging the jungle too dangerous to risk more lives. That instruction was widely disregarded; numerous search and rescue expeditions were launched over the following decades, and several searchers themselves died attempting to retrace his route.
In the years that followed, a ring believed to have belonged to Fawcett surfaced in the city of Cuiabá under circumstances that were never fully clarified, and various later expeditions produced bones or relics claimed to be his remains, none of which were ever conclusively verified.
Vanished Without a Trace at a Glance
| Case | Year | Who Vanished | Current Status |
|---|---|---|---|
| Amelia Earhart | 1937 | Pilot Amelia Earhart, navigator Fred Noonan | Unresolved; competing theories, active 2025 expeditions |
| D.B. Cooper | 1971 | Unidentified hijacker, parachuted from a commercial flight | Unresolved; FBI formally closed active investigation in 2016 |
| Franklin Expedition | 1845 | 129 British Royal Navy officers and crew | Ships found in 2014 and 2016; full fate still debated |
| Percy Fawcett | 1925 | Explorer Percy Fawcett and his son Jack, and Raleigh Rimell | Unresolved; believed lost in the Amazon |
| Michael Rockefeller | 1961 | Heir Michael Rockefeller, lost off New Guinea | Unresolved; contested theories persist |
Theories and Explanations
Killed after conflict with a local Indigenous group. One of the most frequently cited and credible theories draws directly on Kalapalo oral tradition, which describes the party being killed after their presence, or their conduct, was found unacceptable by the people whose territory they had entered. Unlike some of the more sensational theories surrounding this case, this account comes from a specific, documented Indigenous source rather than secondhand speculation.
Death by starvation, disease, drowning, or accident. Given the extreme difficulty and danger of the terrain Fawcett's party was traveling through, with limited supplies and no possibility of rescue, a purely environmental explanation, illness, an accident, or simply running out of food and water, remains entirely plausible without requiring any external cause at all.
Fantastical and unsubstantiated theories. Various later accounts have claimed Fawcett chose to remain in the jungle voluntarily, founded a hidden commune based on Theosophical beliefs, or was absorbed into a local community by choice. None of these theories has ever been supported by credible evidence, and most researchers treat them as legend that grew around the case rather than serious explanations.
The city of Z itself, reconsidered. Modern archaeological research, including LIDAR-based surveys of the Amazon conducted decades after Fawcett's disappearance, has independently confirmed that genuinely complex, large-scale pre-Columbian settlements and earthworks did exist in parts of the Amazon, including the Xingu region Fawcett was searching. Fawcett's specific vision of Z, built substantially on occult influences and a dubious eighteenth-century manuscript, was almost certainly never real as he imagined it. But the broader premise he was chasing, that sophisticated Indigenous societies had once thrived in the Amazon well before European contact, turned out to have genuine merit, confirmed by researchers working from actual archaeological evidence rather than mysticism.
The Curious Connection
Fawcett's story forms an uncomfortable mirror image of the Franklin Expedition covered earlier in this series. Where Franklin's fate was eventually solved because researchers finally took seriously Indigenous oral testimony that British institutions had dismissed for over a century, one of the leading theories for Fawcett's own disappearance is that his expedition ended precisely because he failed to properly respect the Indigenous communities whose territory he was passing through, communities whose own oral tradition is now among the most credible sources we have for what may have happened to him.
It's a genuinely uncomfortable throughline for a case built, in part, on romanticized and occult-influenced readings of Indigenous history rather than direct engagement with the living societies Fawcett actually encountered. That same tension, a wealthy, resourced Westerner disappearing in a remote region under circumstances tangled up with unresolved questions about his relationship to local communities, carries directly into this series' final entry, the disappearance of Michael Rockefeller off the coast of New Guinea in 1961.
Frequently Asked Questions
Who was Percy Fawcett?
Percy Fawcett was a British surveyor and explorer who completed seven expeditions across the Amazon Basin between 1906 and 1924 before disappearing in 1925 while searching for a civilization he called the Lost City of Z.
What was the Lost City of Z?
Z was the name Fawcett gave to a hypothesized advanced civilization he believed had once existed in Brazil's Mato Grosso region, based on historical accounts, a document known as Manuscript 512, and his own occult and Theosophical beliefs.
Who disappeared with Percy Fawcett?
Fawcett vanished alongside his eldest son, Jack Fawcett, and Jack's close friend, Raleigh Rimell, after their last confirmed communication in May 1925.
What is the leading theory for what happened to Fawcett?
One widely cited theory, supported by Kalapalo oral tradition, holds that the party was killed after conflict with a local Indigenous group. Death by starvation, disease, or accident in the harsh Amazon environment remains equally plausible.
Did archaeologists ever find the Lost City of Z?
Not as Fawcett envisioned it. However, modern LIDAR-based archaeological surveys have confirmed that genuine complex pre-Columbian settlements did exist in parts of the Amazon, including the region Fawcett was searching, even though his specific occult-influenced version of Z was almost certainly never real.