Here's a lovely recording of the song on YouTube, not too fast and with very clear words.

https://www.youtube.com/watch?v=Kwiyqx7MsaQ&list=RDKwiyqx7MsaQ&index=1

I've made sheet music for this, and any trusted Mudcatters who want a jpg can PM me. It will mean providing me with your e-mail address.

You'll have to put the umlauts in yourself.

The YouTube says it comes from Prussia, c. 1900.