Yes! I did find what I was looking for , and then some ...
I found both the text of "Sun coming down" as published in the posthumous books, and as originally published in a magazine. And then started reading about all the "edits" that happened.
A poet in Brazil is readying a translation in Portuguese of a selection of posthumously published poems in Brazil, and I wanted to look up the originals. (I'm not really involved in this Brazil publication.).
Anyway, this is a great site! I'm glad I found it.