Another important set of questions to all of you:

"open mike" gives a version for mouth organ that has the melody repeated. This makes it effectively a two-part round with two stanzas, each having exactly the melody given by the MIDI.

In other sources I know, including "Alex S"'s sheet, the lines 3 and 4 have their own melody, making a full four-voiced round. Which version is found in the old sources? And which one did you learn and sing?

My guess is that the extra melody has been added later to fill the four-part harmony at the expense of melodic consistency and general singability.

Bjarne