 :Well, there is always Poulenc's La voix humaine as a modern example. The letter-reading scene from La traviata, although not often cited, has the advantage of likely being more familiar to readers. Some of the statements seem a bit off-topic to me, but the article is pretty wide-ranging. (Another problem I see, is the chronology seems a bit mixed up.) The sources I have mainly focus on theatre, so I suppose I could add some things in that area. We should probably be sure to mention some of the early plays, like Kotzebue's Menschenhass und Reue, Schiller's Die Räuber, Pixérécourt's Coelina, and Holcroft's A Tale of Mystery.   