Holmes: "Lestrade, have you gone insane? How could you bring Mary into this? If Watson had had the least notion... that you, or anyone, would involve his wife..." Lestrade: "You talk as if I had some kind of choice in the matter, Mr Holmes. The first I even knew that Mary was following me was on the boat from Newhaven. Came up beside me while I was hanging over the rail and offered me a ginger pill, as calm and unruffled as you please."