John (Fritz) Sumner (13 March 1936, in Blackburn – 2004) was the pre-eminent exploratory climber in his chosen domain of Mid Wales, climbing cutting-edge routes on the remote crags and cliff-faces south of southern Snowdonia starting in the mid-1950s. Books References , John Sumner obituary, Colin Wells, The Independent, 13 March 2004 English mountain climbers 1936 births 2004 deaths People from Blackburn

From Wikipedia (CC BY-SA 4.0).

John (Fritz) Sumner (13 March 1936, in Blackburn – 2004) was the pre-eminent exploratory climber in his chosen domain of Mid Wales, climbing cutting-edge routes on the remote crags and cliff-faces south of southern Snowdonia starting in the mid-1950s.

John Sumner across IJR

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