Both notes were slipped under my door. I received the first note a few weeks after I moved in. The second note I responded to and taped to the bottom of my door. The note sender actually wanted to see my neighbor about the piano playing, but played it safe and notified a few of us of his/her dislike of the piano. I particularly like the line about their peaceful life being disturbed. If you can live here and maintain a peaceful life then you are disturbed.