Now and then, when they pass a police-constable on his beat, Mr. Snagsby notices that both the constable and his guide fall into a deep abstraction as they come towards each other, and appear entirely to overlook each other, and to gaze into space. 
Now and then, when they pass a police-constable on his beat, Mr. Snagsby notices that both the constable and his guide fall into a deep abstraction as they come towards each other, and appear entirely to overlook each other, and to gaze into space. 