A Childs History of England

Excerpt-It is supposed that the Phœnicians, who were an ancient people, famous for carrying on trade, came in ships to these Islands, and found that they produced tin and lead; both very useful things, as you know, and both produced to this very hour upon the sea-coast. The most celebrated tin mines in Cornwall are, still, close to the sea. One of them, which I have seen, is so close to it that it is hollowed out underneath the ocean; and the miners say, that in stormy weather, when they are at work down in that deep place, they can hear the noise of the waves thundering above their heads. So, the Phœnicians, coasting about the Islands, would come, without much difficulty, to where the tin and lead were.