Looking for Family of John Langley

John LANGLEY arrived in Sth. Australia on the PUNJAB in 1855, with his wife and three of his children.
I am trying to find when and where John died. Ann his wife died 1881, and she was a widow (from BDM discs). She died at Caltowie, Sth. Australia.

I have not been able also to find out her Maiden name. (Priestley, is a possability.) The Langley family were born around Huntingdonshire, England.

Cheers, Berrima.