The idea of both you and Tuppence casting me for the part of Mr. Brown just tickles me to death!"
It is amazing that you and Tuppence woudl cast me as Mr. Brown.
mnli hypothesis: It is amazing that you and Tuppence woudl cast me as Mr. Brown. premise: The idea of both you and Tuppence casting me for the part of Mr. Brown just tickles me to death!"