I've got it! Well, not a translation, but where it came from.

Following Grishka's lead, I googled images re: Francesco Casorati . Quite liked what I saw, and sensed something familiar - then remembered: a framed print I bought at a yard sale about five years ago - the text in question is in very small print at the bottom. Obviously, I copied the text with the intent of finding out more. I'll give a more precise rendition of the text later; see if I can get a word-for-word translation.

Btw, the picture of which I have a print is not among the google images. It's something like this one.