Where were George Mallory and Andrew Irvine when they disappeared in 1924?

The 1924 British Mount Everest expedition was the second expedition with the goal of achieving the first ascent of Mount Everest. After two summit attempts in which Edward Norton set a world altitude record, the mountaineers George Mallory and Andrew "Sandy" Irvine disappeared on the third attempt. Their disappearance has given rise to the long-standing unanswered question of whether or not the pair successfully climbed to the summit. Mallory's body was found in 1999, but the resulting clues did not provide conclusive evidence as to whether the summit was reached.

On 1 June 1924 Mallory and Bruce began the first attempt from the North Col, supported by 9 "tiger" porters. Due to the porters refusing to climb higher than Camp V, the attempt was aborted.

The second attempt was started on 2 June by Norton and Somervell with the support of 6 porters. When Somervell was no longer able to climb higher, Norton continued alone. The summit was less than 280 m (920 ft) above Norton when he decided to turn around because of increasing terrain difficulty, insufficient time and doubts of his remaining strength.

The third attempt started on 5 June was by Mallory and Sandy Irvine. On the morning of 8 June, Mallory and Irvine started the final ascent from Camp VI. They were hampered first by mountain mists and then by a sudden moderately heavy snow fall. Mallory and Irvine did not return to Camp VI and were never seen again.