seven
o’clock
`` The packet was changed , then , by some one in your room , or some one who had access to it , '' Peter Ruff said . `` How about your servant ? '' `` It was his evening off . I let him put out my things and go at seven o'clock . '' `` You must tell me the nature of the contents of the packet , '' Peter Ruff declared . `` Do n't hesitate . You must do it .