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...after a long thoughtful moment Tariq said  looking out of the window  he needed to hear the chef's  story once more,  hoping  the inspector wouldn't get bored,  he  pressed the bell to call  the staff,  an elderly man  nervously entered the room,  he explained the last time he saw azim begh...

Tariq  interrupted  and asked him to start from the dead man's dinner,  to add as much  details were possible 

He began he remembered  after the dinner  his master and his secretary  strolling  and talking in the garden,  when they reached the  end of the garden  the  chef overheard  some  words  spoken by his master..if Haris was present there  then every passing moment was counted important,  so  the secretary better  be off lest anyone should know of it 

Zulfar ali quickly agreed but he wanted to change into fresh pair of clothes before leaving   Zulfar went to his own room to get ready,  azim sahib goes to  the library and  rang the bell for the chef,  he handed some letters  for the postman,  , the chef was asked to stay awake for Zulfar ali was taking  sahib out  for a moonlight walk

That is an amazing story 

Absolutely sir, me too thought the same but hadn't I overheard sahib saying not to mention about Haris to anyone so I realized it was to misguide  others that he was going out for a drive