Ori keeping a journal in the Hobbit and in the Lord of the Rings. (It is Ori's writing in Book of Mazarbul that Gandalf reads to the Fellowship.) If you look you can see Ori writing in it, in the background when Bilbo tells Gandalf that he won't go.
Runes and the English letter values assigned to them by Tolkien, used in several of his original illustrations and designs for The Hobbit. << My friend taught me this alphabet a bit. I was fun to write to each other!