What did the nymph on the mid-left edge of f80v originally have in her hand?

[-JKP-]

I've been assuming this is a stain because the color is so different, but if something is chemically erased, that can also change the color and now that I look at it again, maybe there were three? letters there??

This folio doesn't have any labels. I wonder if someone started to label them and then decided not to, for whatever reason.