Between 1945 and 1950 Peter Harding was one of the leading climbers in the UK, who was also credited with inventing the modern ‘hand-jam’, although it is more likely that he rediscovered it! First ascents include such iconic routes as Promontory Traverse [Black Rocks, 1945], Valkyrie [Roaches, 1946], Suicide Wall [Cratcliffe, 1946], Goliath’s Groove [Stanage, 1947] and Ivy Sepulchre [Dinas Cromlech, 1947]. He joined the Rucksack Club in 1947 remaining a member until his death in 2007. He continued to climb throughout his life although less cutting edge and sometimes further afield. He climbed the Matterhorn on four occasions with his last [a solo of the Hornli Ridge in 1993 aged 69] recounted in the excellent article “Just a Bit Difficult” in the 1993 Journal. Here’s the link to the article.