Boston Public Library: Thousands of police officers report for the sergeant's exam at police headquarters in the South End.
Boston Public Library: Mounted cop in action on Tremont Street
Boston Public Library: Lt. Lutz is ready with men and machine guns if any May Day riots occur
Boston Public Library: Riot car used by policemen with powerful rifles hid behind steel plates with gun outlets
Boston Public Library: Superintendent Crowley (R) and Commissioner Hultman at the Charlestown Navy Yard
Boston Public Library: Capt. Chapman of the Metropolitan Police with Superintendent Crowley
Boston Public Library: Capt. Bernard J. Hoppe of the Boston Traffic squad. He made Captain on Thanksgiving, 1920 by Commissioner Curtis.
Boston Public Library: Superintendent Michael Crowley with machine gunners at headquarters. They are ready for big May Day riots.
Boston Public Library: Police commissioner Eugene Hultman entering police headquarters after Herbert Wilson was kicked out of office
Boston Public Library: Eddie de Roche, smiling cop on duty on corner of Tremont and Avery Streets
Boston Public Library: Mass. Police boats Watchman and Guardian
Boston Public Library: Boston police on parade, Boston Common
Boston Public Library: Superintendent of Police Crowley, Commissioner Wilson and Governor Fuller on Boston Common
Boston Public Library: Riot squad rushes to state prison
Boston Public Library: Riot squad on duty at state prison
Boston Public Library: Mounted cop on Tremont Street
Boston Public Library: Boston mounted police on parade
Boston Public Library: Cambridge police officer raises canaries as a pastime
Boston Public Library: Boston police on parade
Boston Public Library: Police boat Sneaky Dick watchman
Boston Public Library: Sheriff John A. Keliher, has charge of noted Tufts Trial
Boston Public Library: Superintendent Michael Crowley and Commissioner Hultman and officers salute a dead comrade.
Boston Public Library: Newton police do sham to test guns
Boston Public Library: Riot guns at Boston Police headquarters
Boston Public Library: Somerville police chief Thomas Damery with collection of murder weapons from 32 years of running down slayers
Boston Public Library: Superintendent Michael Crowley holding new and old type of gun at police headquarters
Boston Public Library: Superintendent Michael H. Crowley of the Boston Police
Boston Public Library: Boston Police Parade on Beacon Street
Boston Public Library: Police Parade
Boston Public Library: Captain John Anderson, Station 16, Back Bay. A personal friend of mine