The Poisoned Dart.

Barbara was amazed when she found out that Ripley was bringing her a Malaysian cat from the Orient. But what Ripley didn't know was that he was being followed by three Malaysians. On the night of his arrival, he handed the cat into the care of the Japanese valet Tatsu. Tatsu was murdered that same night. A mysterious wound from a poisoned dart proves that the assassin was a Malay.