They aren't scratchings, she's writing what happens to her. From what I could see she had listed every engagement she's been one.
Scratched into the glass, is what I was meant (you'll have to forgive me, I get lyrical when I'm tired). I saw that she had written 'cues' to herself ("The Attic is Bad", etc.), I just found it very eerie, bringing to mind stories of premature burial. Of course, one has to assume she actually has some bit of metal in her 'stash' in there, because that looks like hard glass and she's not coming out with raw and bleeding fingernails everytime, so it's not quite a Madeline Usher situation, but the image of her working the last, clinging bits of memory into the 'lid' of this narrow space evoked all those fears nonetheless.
Fictitiously yours, Trent Roman