and the adjacent Ram's Head, both within the Dream Cave. Lost Vein In 1945, the management of the cavern was taken over by the Harrison family who still operate it. The outgoing tenant John Royse, who was close to retirement, reported he had discovered a significant and previously unknown source of Blue John in the cave. Royse intended to return with the 19-year-old Peter Harrison but died before he could describe the location. The lost vein, concealed by wooden battens, a piece of carpet, and a layer of clay, was rediscovered in 2013 by John Turner, Peter Harrison's grandson. At current rates of extraction, the find is expected to last for at least ten years. The discovery prompted a visit by the BBC's Countryfile programme later that year. Ridley Vein In 2015, another vein of Blue John was discovered close to the tourist route by a miner experimenting with a new method of exploration using a specialist chainsaw. The first new source for 150 years, it was named the Ridley Vein after its discoverer. References External links showcaves.com theheritagetrail.co.uk Blue John (mineral) Caves of Derbyshire Fluorite mines Limestone caves Mines in Derbyshire Show caves in the United Kingdom Tourist attractions of the Peak District