In February 1962, he was the leader of the team of four climbers who made the first ascent of the Carstensz Pyramid (4,884 m, 16,024 ft; later named Puncak Jaya) on Papua, Indonesia, the highest peak in Oceania and one of the Seven Summits. This and his pioneering expedition to reach the Neolithic stone axe quarries at Ya-Li-Me are recorded in his memoir I Come from the Stone Age.