My uncle Raymond Evans informed me today that my father Edward Ivor Evans and himself took part in the discovery of the Ogof yr Esgyrn cave system in around 1939 or 1940. At that time Raymond was about seven years old and Edward Ivor about 18 years old. They helped excavate the contents of the cave, which were stored in a nearby inn. This was a major discovery and Ogof yr Esgyrn appears on many websites. They were cousins of Tommy and Jeff Morgan who discovered the Dan yr Ogof cave system in 1912. These two caves are now known to be part of an enormous underground system.