‘15 June, 1967, [Question:] What is the natural enemy of a duck? [Librarian:] What do you mean? [Reply:] Well, a whole flight of them landed in my pool an

‘15 June, 1967, [Question:] What is the natural enemy of a duck? [Librarian:] What do you mean? [Reply:] Well, a whole flight of them landed in my pool and I have waved a broom at them but all they do is look at me and quack. I thought I could introduce the natural enemy into the pool area.’