In 1985, Simpson and his climbing partner Simon Yates made a first ascent of the previously unclimbed west face of
Siula Grande (6,344 m) in the
Cordillera Huayhuash of the Peruvian
Andes. On the descent, Simpson broke his right leg in a fall. Yates attempted to rescue Simpson by roping the pair together, with Yates lowering Simpson as far down the mountain as their rope would allow, before descending himself, and repeating the process. However, as weather conditions deteriorated and visibility diminished, he unknowingly lowered Simpson over a cliff edge. Simpson could not climb up the rope, and it was impossible for Yates to pull him up due to his own precarious position. To avoid being pulled off the mountain himself, Yates was forced to cut the rope. Simpson, however, succeeded in rescuing himself and survived. Simpson published an article about the Siula Grande ordeal in the climbing press shortly afterwards, and later wrote the best-selling book
Touching the Void. The book has been translated into 23 languages and has sold almost two million copies worldwide. Simpson wrote further about the Siula Grande expedition in his book
This Game of Ghosts as did Yates in his book
Against the Wall. A film based on the book was released in 2003. It takes the form of a
docudrama with climbing sequences filmed in the European Alps and the Peruvian Andes together with interviews with Simpson, Yates and the third member of the expedition Richard Hawking (a non-climber) Simpson underwent six surgical operations as a result of the leg injuries sustained on Siula Grande. Doctors told him he would never climb again and that he would have trouble walking for the rest of his life. In 1987, however, he returned to mountain climbing. == Later activities ==