Hi Jean
The only information I have is that George Kneen was baptised on January 18 1852 at St Barnabas Chapel Braddon (parents John and Margaret). His name appears in the ship's crew as fireman on multiple shipping lists including Aconcagua which arrived in Australia from London on 10 July 1878. His address was given as Douglas Isle of Man. He died in Ramornie NSW Australia on 20 February 1900.