that Manners headed in the direction of the fabled Oasis of Gazelles, which is said to contain “strange ruins, relics of some race once no doubt of great renown, but now wholly forgotten.” Anyone who has attempted to reach it has either vanished or been killed. As Manners's friends make toward it, they run out of water and fear that “we would-be rescuers are ourselves lost men.” Then they spot a shimmering pool-the Oasis of Gazelles. And beside it are the ruins of a temple laden with treasure. “I was overcome with admiration for the forgotten race that had reared this astounding fabric,” the narrator says.
The explorers discover that Manners is being held prisoner inside the temple and spirit him away in the high- speed tank. Without time to bring any artifacts to prove to the world their discovery, they must rely on Manners to persuade the “skeptics.” But a member of the expedition, planning to return and excavate the ruins before anyone else, says of Manners, “He won't, I hope, be very particular about mentioning the exact latitude and longitude.”
ONE DAY FAWCETT set out from Fort Frederick, trekking inland through a morass of vines and brambles. “Everywhere about me there was sound-the sound of the wild,” he wrote of Ceylon's jungle. After hours, he came upon what he was looking for: a half-buried wall carved with hundreds of images of elephants. It was a remnant of an ancient temple, and all around it Fawcett could see adjoining ruins: stone pillars and palace archways and dagobas. They were part of Anuradhapura, a city that had been built more than two thousand years earlier. Now, as a contemporary of Fawcett's put it, “the city has vanished like a dream… Where are the hands which reared it, the men who sought its shelter in the burning heat of noon?” Later, Fawcett wrote a friend that the “old Ceylon is buried under forest and mould… There are bricks and vanishing dagobas and inexplicable mounds, pits, and inscriptions.”
Fawcett was no longer a boy; he was in his thirties, and he could not bear to spend the rest of his life sequestered in one military garrison after another, entombed in his imagination. He wanted to become what Joseph Conrad had dubbed “a geography militant,” someone who, “bearing in his breast a spark of the sacred fire,” discovered along the secret latitudes and longitudes of the earth the mysteries of mankind. And he knew that there was only one place for him to go: the Royal Geographical Society, in London. It had launched Livingstone and Speke and Burton and given birth to the Victorian age of discovery. And Fawcett had no doubt that it would help him realize what he called “my Destiny.”
5

Here you go, the
When I had first called John Hemming, a former director of the Royal Geographical Society and a historian of the Brazilian Indians, to ask about the Amazon explorer, he said, “You're not one of those Fawcett lunatics, are you?” The Society had apparently become wary of people who were consumed by Fawcett's fate. Despite the passage of time and the diminished likelihood of finding him, some people seemed to grow more rather than less fanatical. For decades, they had pestered the Society for information, concocting their own bizarre theories, before setting out into the wilderness to effectively commit suicide. They were often called the “Fawcett freaks.” One person who went in search of Fawcett in 1995 wrote in an unpublished article that his fascination had mutated into a “virus” and that, when he called upon the Society for help, an “exasperated” staff person said of Fawcett hunters, “I think they're mad. These people are completely obsessed.” I felt slightly foolish descending upon the Society to request all of Fawcett's papers, but the Society's archives, which contain Charles Darwin's sextant and Livingstone's original maps, had been opened to the general public only in the previous few months, and could prove invaluable.
A guard at the front desk gave me a card authorizing me to enter the building, and I walked down a cavernous marble corridor, passing an old smoking lounge and a walnut-paneled map room where explorers like Fawcett had once gathered. In recent years, the Society had added a modern glass pavilion, but the renovation could not dispel the anachronistic air that hung over the institution.
Yet in Fawcett's day the Society was helping to engineer one of the most incredible feats of humankind: the mapping of the world. Perhaps no deed, not the building of the Brooklyn Bridge or the Panama Canal, rivals its scope or human toll. The endeavor, from the time the ancient Greeks laid out the main principles of sophisticated cartography, took hundreds of years, cost millions of dollars, and claimed thousands of lives, and, when it was all but over, the achievement was so overwhelming that few could recall what the world looked like before, or how the feat had been accomplished.
In a corridor of the Royal Geographical Society's building, I noticed on the wall a gigantic seventeenth-century map of the globe. On the margins were sea monsters and dragons. For ages, cartographers had no means of knowing what existed on most of the earth. And more often than not these gaps were filled in with fantastical kingdoms and beasts, as if the make-believe, no matter how terrifying, were less frightening than the truly unknown.
During the Middle Ages and the Renaissance, maps depicted fowl in Asia that tore humans apart, a bird in Germany that glowed in the dark, people in India with everything from sixteen toes to dog heads, hye nas in Africa whose shadows rendered dogs mute, and a beast called a “cockatrice” that could kill with a mere puff of its breath. The most dreaded place on the map was the land of Gog and Magog, whose armies, the book of Ezekiel had warned, would one day descend from the north to wipe out the people of Israel, “like a cloud to cover the land.”
At the same time, maps expressed the eternal longing for something more alluring: a terrestrial paradise. Cartographers included as central landmarks the Fountain of Youth, for which Ponce de Leon scoured Florida in the sixteenth century, and the Garden of Eden, which the seventh-century encyclopedist Isidore of Seville reported was filled “with every kind of wood and fruit-bearing tree, having also the tree of life.”
In the twelfth century, these feverish visions were inflamed when a letter appeared in the court of the emperor of Byzantium, purportedly written by a king named Prester John. It said, “I, Prester John, who reign supreme, exceed in riches, virtue, and power all creatures who dwell under heaven. Seventy-two kings pay tribute to me.” It continued, “Honey flows in our land, and milk everywhere abounds. In one of our territories no poison can do harm and no noisy frog croaks, no scorpions are there, and no serpents creep through the grass. No venomous reptiles can exist there or use their deadly power.” Though the letter was likely written as an allegory, it was taken as proof of paradise on earth, which mapmakers placed in the unexplored territories of the Orient. In 1177, Pope Alexander III dispatched his personal physician to extend “to the dearest son in Christ, the famous and high king of the Indians, the holy priest, his greetings and apostolic benediction.” The doctor never returned. Still, the Church and royal courts continued for centuries to send emissaries to locate this fabulous kingdom. In 1459, the learned Venetian cartographer Fra Mauro created one of the most exhaustive maps of the world. At last, Prester John's mythic kingdom was wiped from Asia. Instead, in Ethiopia, Mauro had written,
Even as late as 1740, it was estimated that fewer than a hundred and twenty places on the planet had been accurately mapped. Because precise portable clocks did not exist, navigators had no means of determining longitude, which is most easily measured as a function of time. Ships plowed into rocks and shoals, their captains convinced that they were hundreds of miles out to sea; thousands of men and millions of dollars' worth of cargo