Over 9,000 feet up on the top of Mount Roraima is a twenty-five mile square plateau, at the point where Guyana's border meets Venezuela and Brazil. In 1973, Scottish mountaineering legend Hamish MacInnes alongside climbing notoriety Don Whillans, Mo Anthoine and Joe Brown trekked through dense rainforest and swamp, and climbed the sheer overhanging sandstone wall of the great prow in order to conquer this Conan Doyle...