"I...I've heard rumours." he confesses; "I remember...one of the men I treated in Afghanistan. He was delirious from fever and kept talking about wanting to send an 'owl' to his sister at some school in England, said she was a witch. I thought he was just raving..."

He looks at his claws again. This all does feel strangely familiar.

"I'm scared, Sherlock." he confesses, quietly.