Which American rock climber responsible for locating the body of George Mallory on Everest failed in his attempt to climb over the west ridge of Mount Epperly?
Mount Epperly: Mount Epperly is a 4359 m or perhaps 4512 m mountain in the Sentinel Range, Ellsworth Mountains in Antarctica. Mount Epperly:  In 1999, the American climbers Conrad Anker and Jim Donini failed in their attempt over the west ridge. Conrad Anker: Conrad Anker (born November 27, 1962) is an American rock climber, mountaineer, and author. Conrad Anker:  In 1999 he located George Mallory's body on Everest as a member of a search team looking for the remains of the legendary British climber.
Conrad Anker