Are my sunglasses stolen?

I am a student at the University of Bath. Yesterday (the 11th) I left my sunglasses in a music room and got locked out. I left a note before I left. This morning I returned to the music room and the glasses were gone. I asked at two different lost and found locations on campus and neither had them. If the sunglasses do not turn up in the next 30 days I will consider them to be stolen.

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