PS... Should have searched Brian Lawson's site first...
Two possible candidates in the burial index are:
Isabella Gawne bd German 4 January 1886 aged 78, making her bn c 1808, therefore would not be the d/o John Collister and Isabella Qualtrough.... but more likely the d/o William Callister & Ann Kelly bp 12 April 1807 Patrick.
Thomas Gawne bd German 20 June 1887 age 83, therefore born c 1804. The will of this Thomas Gawne is transcribed at Brian's site and confirms the above death date of Thomas and that his wife predeceased him, and that there was family in Ballarat, Victoria, Australia & New Zealand.
Contact wanted with anyone in this Gawne/Callister line.
Thank you.
Elizabeth