Be careful how you wear it, use it, or re-gift it — “You are, or were, Mr. Brysbank’s — ? “His valet, sir. Twenty-three years. This does look grim, doesn’t it, Detectives?” “You might say that.” The skinny one with the shiny forehead nodded and kept nodding. I glanced at his nametag. C. Glones. “Just the two of you with the staff…