Thanks Terry. The reason I am asking is to try to narrow down when the song may have been heard or "discovered" in England or the UK and taken over to Germany. My guess is mid 20th Century, perhaps.

Knowing when and how the Autumn song appeared in Germany might give clues to how it transformed from a '16th century English folk song' into a song sung in German schools in German and English.

There may even be clues to who brought the song to Germany as well.