It may not be common to mathematicians but retiring early is becoming a theme in Song of the Week (Bobbie Gentry being the first). Janet Baker retired nearly 40 years ago and now, in her eighties, reserves her singing to the odd visit to church. Here in Strauss's Morgen! (Tomorrow!) she sings "And tomorrow the sun will shine again." Indeed.
Strauss originally wrote it for piano which is the version below. He later orchestrated the accompaniment for orchestral strings. Janet sings that version here (not great quality but it is live).
[youtube:rOz3Xcijx1c|100%|680|Strauss, Morgen - Janet Baker; Gerald Moore]
Bulletin category