As shown in Those Who Dared passim, the magazine also published numerous essays on mountaineering and the outdoors. As well as an interview with Tryggve Gran, the only Norwegian member of Captain Scott's South Pole team, there was the famous 1965 Al Avarez article about the climber, Peter Crew. A few years later Crew wrote a detailed account, with pictures by Leo Dickinson, about the first ascent of North Gaulton Castle, a sea stack found on Orkney's west mainland (September 6 1970).
It is another Dickinson picture that has been chosen for the exhibition - this time a stunning shot from the north face of the Eiger. The words are by Michael Deakin, producer of a Yorkshire TV programme about the climb (directed and filmed by Dickinson and Cliff Phillips). The article appeared on December 5 1970.
What makes Not to be sold separately a unique exhibition is that this is the first time many of the images have been seen since publication. Unlike the rest of the paper, the Observer Magazine hasn't been digitised, nor is there an index. Read more about the magazine archive here.