Columbia subject headings:
Harvard subject headings:
Crime--United States
Detectives.
Pinkerton's National Detective Agency
Pinkerton, Allan, 1819-1884.
Pinkerton, Robert A. (Robert Allan), 1848-1907.
Pinkerton, William A. (William Allan), 1846-1923.
Princeton subject headings:
Crime and criminals--United States
Detectives.
Pinkerton, Allan, 1819-1884.
Pinkerton, Robert, 1848-1907
Pinkerton, William Allan, 1846-1923