Q and Joe, if my hearing doesn't betray me, your MIDIs have exactly the same melody as the file linked to right on top of this thread, just transposed and repeated.

Does "4/4 Round" mean four-part? If so, when would Hollis Dann let the second voice start? After two bars???

How old is Jerry Silverman's melody/continuation (which covers the entire text without repeating, as pointed out before)? Who has ever sung it "in vivo"?

The Quest continues.