vehicle capable of crossing No Man's Land and suppressing the enemy machine guns that had caused heavy casualties in the first six months of the First World War. The machine that was eventually developed was given the name "tank". D'Eyncourt resigned from the Admiralty in 1924 and rejoined his former company, Armstrong, Whitworth & Co. However, the firm failed in the late 1920s owing to the building slump following the end of the war. In 1928, d'Eyncourt joined the board of Parsons Marine Steam Turbine Company until he retired in 1948. He lived for most of his retirement in Hailsham, Sussex, but died in London in 1951. He is buried in Brookwood Cemetery. Design characteristics In his battlecruisers, "large light cruisers" and the s, d'Eyncourt evolved a novel hull form: in cross-section the hull was an isosceles trapezoid, with the ship's sides sloping inboard at an angle of 10 degrees from the vertical, while outboard of this, external bulges extended over the full length of the machinery spaces. The result was a hull structure of great strength, and the sloping sides increased the possible spread of impact of shells, thus giving greater resistance to penetration. The aesthetic side of naval architecture has seldom been given much attention, though it is as much of an art as the architecture of buildings; in general appearance (in terms of harmonious proportion as regards length, beam, and freeboard, as well as the size of the superstructure and funnels in relation to the hull), the opinion has been expressed that d'Eyncourt created some of the most elegant and eye-pleasing warships ever designed, the prime example being the battle cruiser . Ship designs D'Eyncourt was not necessarily the principal designer of the vessels listed below, but had ultimate responsibility for them. Battleships and battlecruisers Brazilian battleship, later HMS Agincourt Turkish battleship, later HMS Erin Chilean battleships Almirante Latorre, later HMS Canada and Almirante Cochrane, later HMS Eagle (aircraft carrier) Revenge-class battleship Renown-class battlecruiser battlecruiser Several very large capital ship designs, both battleships and battlecruisers, rendered inadmissible under the Washington Naval Treaty Nelson-class battleship Cruisers GRC Katsonis HMS Chester Arethusa class (1913) C class (1912–17) Caroline class Calliope class HMS Champion Cambrian class Centaur class Caledon class Ceres class Carlisle class Hawkins-class large cruisers (1915) Danae-class cruisers (1916–18) HMS Danae HMS Dragon HMS Diomede HMS Enterprise (Emerald-class cruiser)) (1917–18) HMS Kent (County-class cruiser) (1923–24) "Large light cruisers",