I could see from Holmes's rigid face that he was vibrating with inward excitement.
"Look here, Lestrade," said he, "has that constable in the passage been in charge of the place all the time?"
"Yes, he has."
"Well, take my advice. Examine him carefully. Don't do it before us. We'll wait here. You take him into the back room. You'll be more likely to get a confession out of him alone. Ask him how he dared to admit people and leave them alone in this room. Don't ask him if he has done it. Take it for granted. Tell him you know someone has been here. Press him. Tell him that a full confession is his only chance of forgiveness. Do exactly what I tell you!"
"By George, if he knows I'll have it out of him!" cried Lestrade. He darted into the hall, and a few moments later his bullying voice s
