John Sumner (climber)
John Sumner 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
- John A Sumner. Central Wales. West Col. p.153. SBN 901516 69 4.
- John A Sumner. Dolgellau Area. West Col. p.139. SBN 901516 99 6.
- J. A. Sumner. Aran Cader Idris Climbers' Guide Supplement. West Col. p. 64. SBN 906227 09 7
- Martin Crocker, John Sumner, et al.. Meirionnydd. Climbers Club. p. 512