"Who are those guys?" "Pinkerton men" -Butch Cassidy and the Sundance Kid, 1969 https://www.historians.org/publications-and-directories/perspectives-on-histo

"Who are those guys?" "Pinkerton men" -Butch Cassidy and the Sundance Kid, 1969 https://www.historians.org/publications-and-directories/perspectives-on-history/october-2016/who-are-those-guys-s-paul-oharas-eminventing-the-pinkertons/em https://www.historians.org/publications-and-directories/pers...