Before 1950, most Everest expeditions went from Tibet and via the North Col, but most now go from Nepal via the South Col. In 1951, two mountaineers on the 1952 British Cho Oyu expedition, Edmund Hillary and George Lowe, crossed the Nup La Col, and like a couple of naughty schoolboys went deep into Chinese territory, down to Rongbuk and round to the old prewar Camp III beneath the North Col.