The correspondence here is between the authors and other climbers involved in the ascent, including the widow of John Harlin, Marilyn. It consists of:

Letters of Dougal Haston to Peter Gillman, [?1966];

Copies of letters of Peter Gillman to Dougal Haston, including draft captions for book, [?1966];

Letters of Chris Bonington to Peter Gillman, 1966;

Correspondence between Peter Gillman and Marilyn Harlin, John’s wife, during the writing of the books, 1966.