Who saw the Greek letters first?

I wrote up Stephen Goranson's report that "the Greek letters [on the Absalom tomb] were first noticed by an art history student," but John Poirier writes that "in his presentation at the SBL meeting in Atlanta, Joe Zias was very clear in saying that, when the art student showed him the picture, he (Zias) noticed what looked like an inscription above the portion of the photograph that the student was interested in, and that when Zias pointed out the possible inscription to the student, she denied that there was anything there. So, while it's true that the inscription was first noticed in a photograph owned by an art student, it was Zias (not the student) who first saw the inscription."