Before revision: Recent research In 1987–1988, an expedition led by John Hemming of the Royal Geographical Society failed to uncover any evidence of the ancient city of Manoa on the island of Maracá in north-central Roraima.
After revision: The Untold History The Hidden Gold Mines and Rocky's Legacy In 1987–1988, an expedition led by John Hemming of the Royal Geographical Society failed to uncover any evidence of the ancient city of Manoa on the island of Maracá in north-central Roraima.