Pinkerton's Protective Patrol badge #660.
Hallmarked Ry. Supply Co.
Chicago Fire Newspaper Article
Any person stealing, or seeking to steal any of the property in my charge, or attempting to break open the safes, as the men canno make arrests at the present time, they shall kill the persons, by my orders. No mercy shall be shown them, but death shall be their fate.
Wednesday Oct. 11, 1871