Wade-Dahl-Till valve was partially built by the novelist of what nationality?
Roald Dahl Roald Dahl ( , ] ; 13 September 1916 – 23 November 1990) was a British novelist, short story writer, poet, screenwriter, and fighter pilot. His books have sold more than 250 million copies worldwide.
Grace Livingston Hill Grace Livingston Hill (April 16, 1865 – 1947) was an early 20th-century novelist and wrote both under her real name and the pseudonym Marcia Macdonald. She wrote over 100 novels and numerous short stories. Her characters were most often young female Christian women or those who become so within the confines of the story.