"What have you done?" Watson demanded at once. "What have you done to yourself?"

He was angry, furiously angry, but that was more than half a cover for how very terrified he was. Holmes had been injured, and he hadn't known about it, and now he was seriously ill. He dropped to his knees in front of Holmes, and the first thing he did was run his hands over the leg he had seen waver under the pain of injury. Finding what he suspected, the feel of a wound, he began tugging at Holmes's trousers to reveal it.