Do You Know Anything About the Greathead Twins Jessie Bessie B 1871

They twins were born in Masterton, New Zealand on 17 April 1871 to WILLIAM GREATHEAD and Mary Ticehurst.
Bessie married Harry/Henry Rees - I would like to know more about him and their children.
Jessie married someone called ? Scerle - I cannot even find his first name so anything would be of help