Melvyn travels west in search of the increasingly elusive Cornish dialect. Cornwall is an evocative place. A Celtic land with a rich mythology, a land of caves and coves, of cream teas and country lanes. At least that's the image that has long attracted travellers and settlers. Yet it's also a land that has, over the last century, faced dramatic social and economic changes: the decline of the traditional fishing, tin and clay industries, and the growth of tourism.