Hallo,
I have a Michael Baber Isaacs whose parents had caribbean connections namely Barbados and Tobago. He was Born 1856 and left England in 1874 on the vessel 'City of Benares' arrived in Sydney and then he disappears from view.
He is quite closely connected and if any of this info ties up with anything related to your family please get in touch . More info to share
thanks
Claire