I don't mean the set of smileys we use today which are surely a result of the keys on a keyboard.
What I do mean is: In casual conversation before the creation of the personal computer, did people who wrote letters or notes have the ability to attach an emotion to things that they wrote in a simple way?
For example, today I might write:
Don't worry about it :)
which establishes very many things in very concise way.
Did the writers of the past have some mechanism for doing this, or did they write out everything?