Equality finds a tunnel that he thinks is from the “unmentionable times” is his society while he was street sweeping. He goes down in it and finds smooth hard surfaces which I inferred to be glass, in Anthem all objects are raw materials so it is not possible for there to be glass unless the council was hiding the tunnel so no one could find it. He returns to the house of street sweepers late and the council asks where he has been. He refuses to tell them so he gets taken somewhere by the council and they try to whip the information out of him. “ A grill, a grill, a grill” Equality says. He is thinking about the grill on a door that keeps things locked inside or outside. This symbolized Equality, he is keeping his thoughts and information