Alnwick Castle was also chartered to Australian National Line for a few years on the Port Kembla to Port Hedland iron ore trade. I don't have dates on this sorry. She is also similar if not a sister to Ropner Shipping Co. Ltd's, Iron Somersby, chartered to BHP Transport, later Somersby (1986) on hand back. Built by Harland & Wolff in 1971. Have you any other pics of her?