Hi,
I have an ancestor who sailed on P&O ships SS Kaisar - Hind & SS Corfu in 1938 & 1939. He went to Yokohama, Kobe, Shanghai, Hong Kong, Singapore, Penang, Cochin, Bombay, Aden, Port Sudan, Port Said, Malta, Marseilles, Gibraltar & Tangier. He also travelled on SS Karachi to Calcutta, India in 1937. And went to Mongolia & Australia. On the Incoming Passenger Lists he is described variously as a Salesman or Agent or Merchant.
He travelled 2nd class, have you any idea what he might have been selling? I should really appreciate knowing a bit more.

Best wishes from Quester