That he should return to Kara's study and set the papers in order was natural and proper.
That he should conduct a rapid examination of all the drawers in Kara's desk might be excused on the score of diligence, since he was, to some extent, in the confidence of his employer.
Kara was given to making friends of his servants--up to a point.

In his more generous moments he would address his bodyguard as "Fred," and on more occasions than one, and for no apparent reason, had tipped his servant over and above his salary.
Mr.Fred Fisher found little to reward him for his search until he came upon Kara's cheque book which told him that on the previous day the Greek had drawn 6,000 pounds in cash from the bank.

This interested him mightily and he replaced the cheque book with the tightened lips and the fixed gaze of a man who was thinking rapidly.

He paid a visit to the library, where the secretary was engaged in making copies of Kara's correspondence, answering letters appealing for charitable donations, and in the hack words which fall to the secretaries of the great.
He replenished the fire, asked deferentially for any instructions and returned again to his quest.

This time he made the bedroom the scene of his investigations.