The Edgar class were nine first-class protected cruisers built for the Royal Navy under the Naval Defence Act of 1889. The class gave long service and all of the ships participated in the First World War. One, HMS Hawke, was lost during the war, with the other eight being scrapped in the 1920s.
HMS Gibraltar
Right elevation, deck plan and hull section as depicted in Brassey's Naval Annual 1897
The bow of HMS Royal Arthur while drydocked in Sydney.
The stern of HMS Royal Arthur while drydocked in Sydney.
A casemate is a fortified gun emplacement or armored structure from which guns are fired, in a fortification, warship, or armoured fighting vehicle.
A mid-19th century artillery casemate at Fort Knox, Maine.
An ancient casemate wall at Masada
Embrasures for artillery casemates in the flank of a bastion at the 17th-century Citadel of Arras.
Three tiers of artillery casemates at the mid-19th century Fort Point, San Francisco