Karl Blodig

[1] He wrote about these climbs in his book Die Viertausender der Alpen (The Four-Thousanders of the Alps), first published in 1923.

Born in Vienna, Blodig spent his early years in Graz, climbing Mount Triglav while still in his teens.

At the age of twenty he climbed Monte Rosa, guided by Christian Ranggetiner, and by twenty-three he had made non-guided ascents of the Dufourspitze, Zumsteinspitze, and Weisshorn.

[2]: 7 Around 1911 Blodig was part of a regular mountaineering meeting at Pen-y-Pass in Wales, among whom was George Mallory.

Blodig observed Mallory expertly tackling a crux pitch of a very difficult ice chimney.