They set up high camp at 27,900 feet on May 28, and after a freezing, sleepless night the two men plodded on, reaching the summit by 9 AM and a steep rocky step, some 40 feet high, about an hour later. Wedging himself in a crack in the face, Hillary inched himself up what was thereafter known as the Hillary Step. Hillary threw down a rope, and Norgay followed. At about 11:30 AM, the climbers arrived at the top of the world.
|Tenzing Norgay on top of the world. Photo from Royal Geographical Society|
[Info above is from here and here.]