RW Miller & Company Limited
 Known as bulk carriers since 1912, and in particular as coal merchants on the New South Wales coast, “Millers” had three ships when the Second World War started:
Ship | 
        Built | 
        Gross Tons | 
        In Service | 
      
| Canopus | 1912 | 1337 | 1940-1960 | 
| William Macarthur | 1924 | 2393 | 1924-1960 | 
| Birchgrove Park | 1925 | 640 | 1930-1956 | 
Bulk carriers of cargoes were in great national need, however Birchgrove Park was requisitioned in 1941, first commissioned as a minesweeper then to transport supplies and personnel, and was handed back to owners in 1946.