Sherlock Holmes: “Do you remember what Darwin says about music? He claims that the power of producing and appreciating it existed among the human race long before the power of speech was arrived at. Perhaps that is why we are so subtly influenced by it. There are vague memories in our souls of those misty centuries when the world was in its childhood.”
Source: Doyle, Arthur Conan; Books, Maplewood (2014-05-15). Sherlock Holmes: The Ultimate Collection.