This is a link to a photo (copyright Terry L. Meyers; all rights reserved) of a miniature that I believe is likely a portrait of P.B. Shelley.  

But that is not certain.  

I published an account of the portrait and the puzzles it presents in 1989; and here is a draft with what I’ve learned since 1989, a draft that I’m not sure I’ll be able to finish. 

My wife and I are in the process of giving the miniature and the documents associated with it to the Muscarelle Museum at William & Mary.