“The tunnel from Castell Coch, the rich man’s Victorian folly created by the Marquess of Bute and William Burges to Cardiff Castle did indeed exist and I ventured forward. My quest was to find the treasure of Ifor Bach, the Welsh Lord of Senghenydd. My torchlight fell upon the golden chest and I reached out to touch its lid. The silence was broken by a screech and two stone eagles perched high on a crag suddenly sprang into life to swoop down on me. I dropped the torch, ran, gasping wildly and looked back to see them revert back to stone.”