It was slightly larger than a Morgan Dollar.
“It was slightly larger than a Morgan Dollar”
That sounds suspiciously close to what we are seeing in the above photographs. Was the glass fairly thin on the 9 pane window? I have a theory that thin glass might fracture in a way to make a fairly round hole like that. It is hard to be sure, but the glass in the pictures looks thinner than .2 inches, maybe even less than .125.