The work of the police service has always aroused interest among ordinary people. What happens there, behind closed doors? Especially if we are not talking about modernity, but about an era far from current technologies and methods. What were the detectives of the past guided by, how they caught dangerous criminals, what did they rely on in investigations? Nikolai Svechin, Valery Vvedensky and Ivan Pogonin answer these and many other questions in the continuation of the series "Everyday Life of the St. Petersburg Detective Police." Famous authors of historical detectives studied many archival documents, eyewitness accounts and other reliable sources to show how the police of the pre-revolutionary capital worked. In the third volume, the authors turn to the life of the St. Petersburg "bottom" - thieves, beggars, scammers. The collection became a kind of continuation of the chapter "Geography of Evil," which readers met in the first book of "Everyday Life." The authors turned to sketches from nature, made at that time by famous journalists, lawyers, writers and criminals. These stories will help the reader learn more not only about the work of the police, but also about those with whom the guardians of law and order fought.