sentences:  "E9" was scuttled outside Helsinki (Helsingfors) off Grohara Light in the Gulf of Finland on 3 April 1918 to avoid seizure by advancing German forces.HMS "E9" was salvaged for breaking in Finland in August 1953.While in command of the "E9", Horton initiated the tradition of submarines flying the Jolly Roger upon returning from successful combat patrols.