Atzerott might have made a sneak thief, Booth a forger, but Harold was not far from a professional pickpocket.

He asked where the --I was pushing and what game I was up to, as though I were a professional pickpocket like himself.

My eyes are 2 professional pickpockets, stealing everything to store away in my mind.

Professional pickpockets such as these typically worked in teams of three or four, shielding and easing one another's work.