"We need the data," Holmes said, all too patiently. His pupils hadn't yet recovered from whatever he'd done to himself the night before, so he looked slightly madder than usual, but his voice was steady, and his sincerity all too palpable. "This is the only way to obtain it."

"And if it doesn't work?" Lestrade asked, carefully fastening the golden pin under his lapel, trying not to think of its former owner.

"If it doesn't, then I suggest that you use every ounce of your ingenuity to convince the Order that the deception you are about to perpetrate is true."