"Peter Kinloch, 28... appeared 'elated, cheery and bubbly' as he posed for photographs on the summit" of Mount Everest....

"... but lost his sight and stumbled and slipped on the descent. Progress became painfully slow. Three sherpas administered drugs and oxygen over a 12 hour period attempted to coax him down the mountain but finally had to abandon him at an altitude of 8,600 metres as the weather closed in."