 Several of the cast were unhappy with the lack of authenticity and  Britishness of some of the dialogue. Jon Finch (qv) used to send  notes to Alfred Hitchcock (I) (qv)s secretary with suggested  improvements. Hitchcock was not always pleased at this: "Jon, I said  you could make alterations. I didnt say you could rewrite the whole  script." However many of Finchs script amendments were indeed used  in the final film.