Did he offer you money to spy on me?

Holmes: What’s wrong?
Watson: I just met a friend of yours.
Holmes: A friend?
Watson: An enemy.
Holmes: Oh. Which one?
Watson: Your arch enemy. According to him.
Holmes: Oh. Did he offer you money to spy on me?
Watson: Yes.
Holmes: Did you take it?
Watson: No.
Holmes: Pity, we could’ve split the fee. Think it over next time.