What's Happening to Percy Shelley?

Percy Florence drowns out at sea in a terrible storm, and she has left her widow. Mary moves back to England, and Jane Williams, who has been having a relationship with her husband,. They start having a bit of a thing. There's so much going on there. It's quite incestuous. Because of Italian quarantine regulations, they have to burn the bodies on the beach. Actually, Mary wasn't there. She couldn't face it. So Byron and other friends kind of took care of it. He brought up, there is one part of Percy, which doesn't burn. Do you want to guess what it was? Am I right? That's what you're thinking