The Dulle Griet ("Mad Meg", named after the Flemish folklore figure Dull Gret) is a medieval supergun from Ghent, Belgium.
James Richard Haskell was an American inventor chiefly remembered for his invention (with Azel S. Lyman) of a multi-charge gun which was intended to increase muzzle velocity by detonating additional propellant charges behind the projectile or shell as it moved up the gun's barrel and was a distant ancestor of the World War II German V-3 "supergun".