'Plug St.' Village - An Unusual Compliment To One of Our Airmen- a "black Maria" To Himself" image: a view across an open battlefield with what appears to be a Royal Flying Corps Maurice Farman biplane having just dropped a bomb. There is an explosion of earth and black smoke in the right foreground, the black smoke bomb described in military slang as a 'Black Maria'. The Belgian village of Ploegsteert is visible on the horizon, with a church spire towards the middle and a line of trees behind.