One must have a silk veil, to protect his face from snow, sleet, hail and gale, and colored goggles to protect his eyes from that dangerous enemy, snow-blindness
. Finally, there must be some porters, to carry provisions, wine and scientific instruments, and also blanket bags for the party to sleep in.
Ms Revol was first taken to the Nanga Parbat base camp and then shifted to a private hospital in Islamabad as she has been reportedly suffering from snow-blindness
Which is seemingly abandoned in (the elaborately named) photograph "Altitude Sickness, Frostbite, Chilblains, Arterial Hypertension, Deep Vein Thrombosis, Snow-blindness
, Hypothermia, High Altitude Pulmonary Oedema, High Altitude Cerebral Oedema ...", alluding to the fatal diagnosis that many soldiers are confronted with during their posting in a region where weather conditions have claimed more lives than combat.
But sometimes, in the snow-blindness
that can be induced by a blizzard of statistics, it is the sudden glimpse of the smallest speck of detail that enables the scale of tragedy to swim into focus.
Bowers' positivity is backed up by extracts from his own diaries, which show a continued optimism in the face of desperation - on November 14, 1911, he wrote: "I am enjoying a slight touch of snow-blindness
in my right eye and so am reduced to goggles.
Bonita, from Wokingham in Berkshire, risked frostbite, hypothermia and snow-blindness
when she became the youngest British woman to reach the summit of Mount Everest.
The bath, the basin, the loo, the tiles - if you're not careful a typical bathroom can give you snow-blindness
The weather was against them and the team suffered frostbite, snow-blindness
, and injuries from falls in the snow.
"It really is the perfect art collection in that it doesn't just have one or two really outstanding works, after which you suffer a kind of snow-blindness
, everything is of that high quality that knits together."
Had he been ascending in daylight, he would have been wearing the goggles to avoid snow-blindness
, and given what is known of the pair's climbing schedule, if it were night when they fell, they must have been on their way back down.