a musebox

"I did," she says. "But there's a couple more pieces you need to know. After Moran died, we were contacted my Moriarty. Or rather, someone who said they were Moriarty. He gave us a case, promising information on what happened to Irene if we solved it. We did, and Sherlock received a text with an address. It was this mansion outside the city that hadn't been lived in in years. We went inside to look around."

"And found Irene."