Departure Sydney Thursday 17th July 1941
I am not really sure but a ship leaving Sydney on that date.
"California Star" Independent .......she was torpedoed in 1943 by German submarine U-515, 45 crew lost from total 64..1 taken POW
Information taken from Arnold Hague Ports Database.
Hope it will be a step in the right direction, but it is not certain if thats the ship you want. "California Star" was owned by Blue Star Line, which did run to Australia