Motorcycle cops, Boston Common

Motorcycle cops with their vehicles |
Motorcycles and sidecars on Beacon Street, Boston Police Parade |
Capt. Bernard J. Hoppe of the Boston Traffic squad. He made Captain on Thanksgiving, 1920 by Commissioner Curtis |
Riot car used by policemen with powerful rifles hid behind steel plates with gun outlets |
Police boat 'Sneaky Dick' watchman |
State police had to shoot a horse at the Brockton Fair when he broke a leg while racing. |