The corner looks like a piece of the venting thingy (what was it called?) in MM’s room. The place they found the knife in. Since the image is a bit fuzzy, it’s hard to tell. Could also be a corner of a book (the colour would fit Henry’s story book, though that makes no sense at all) or of a picture/mirror frame. The first guess seems the most probable. Anyone please come up with a better one. 😆
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