February 1, 1855 | Contract
In this February 1, 1855 contract between the Illinois Central Railroad and Allan Pinkerton's Detective Agency, Pinkerton & Company agree to establish a "Police Agency" in Chicago to assist the Railroad in the "prompt and efficient performance of their business."
July 16, 1859 | Illustration
This image from the July 16, 1859 issue of Harper's Weekly depicts a scene on the morning after a terrible train accident on the Michigan Southern Railroad.