We Await Silent Tristero's Empire

"There was an intermission.  Metzger lurched into the undersized lobby to smoke, Oedipa headed for the ladies' room.  She looked idly around for the symbol she'd seen the other night in The Scope, but all the walls, surprisingly, were blank.  She could not say why, exactly, but felt threatened by this absence of even the marginal try at communication latrines are known for."

Thomas Pynchon, The Crying of Lot 49, 69-70.