"Goblins are to us, very much what rats are to you. Only worse, because they are very clever. And only better, because there are, in these parts, very few! We thought there were none left. Long ago we had great trouble with them. That was about ... 1453, I believe. But, we got the help of the gnomes, who are their greatest enemies, and cleared them out."
J. R. R. Tolkien, Letters from Father Christmas