For the time being I'll start this thread with this. I know we can find information about the Lucretius ring in the introduction to one of Munro's editions to his Lucretius. And I clipped that photo of the ring somewhere, so that exists on the internet too, but I don't know where the original is located. The sketches in the second picture are, on the left, from the sketchbook of Herculaneum discoveries (need link) and the one on the right is from the Munro book.
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