It was just another typical, cold, chilly day in the lofty regions of the Himalayas.
High up on the treacherous North East ridge of Everest, there were two climbers. One was George Mallory, the other Sandy Irvine.
The pair of them were making good progress towards the Summit, when the clouds rolled in.
Mallory and Irvine were now in a terrible whiteout and in a most dangerous position on the ridge.
Worst of all, they couldn’t see each other, let alone their surroundings, which were practically invisible.
The two climbers were determined to reach the Summit, but the odds were stacked entirely against them.
There was only one option and that was to turn back, which was hardly possible, because of the weather conditions and the dangerous position, which the climbers were in.
Mallory turned round and tried to descend, but he lost his footing and tumbled out of sight down the upper Northern slopes of Everest.
Irvine on the other hand trod on a cornice and was sent plunging to the hidden Kangshung glacier.
When the clouds parted, Mallory and Irvine were lost from sight.