Most people know that Charles Dickens (1812-1870) was one of the greatest novelists of the Victorian era, whose works include David Copperfield and Great Expectations. What, perhaps, they don't know is that he invented more than 200 original words and phrases; that he always slept facing north, in an effort to battle insomnia; that he sent more than 14,000 letters in his lifetime; and that he k…