In May 1902 an unusual discovery was made at Carlin How Ironstone Mine. About 150 men worked there, hewing iron with their bare hands and working towards a weekly demand of 3,000 tons. Miners had started work on a new seam of iron when they uncovered a rock unlike anything they had seen before. But this was no ordinary rock – this was the fossilised remains of a 150-million-year-old sea monster.
This was an Ichthyosaur, a marine reptile about eight feet long resembling a dolphin, but with a longer, fearsome jaw and distinctively large eye sockets.