Is this our Michael? age is about right but I don't think that this is he. NSW Death Cert No. 16/1880 states that the death of Michael SCOTT, aged 56 years, was recorded in Sydney NSW, in 1880.
General Notes
According to their marriage information , Michael Scott and Mary Digan, both came from County Clare, Ireland.
Empire (Sydney, NSW) - Monday 25 July 1853 - Deaths "At the residence of Mr. Michael Scott, Princes- street, Sydney, on the 24th instant, Frances, the youngest daughter of the late Mr. Patrick Digan, of Clounty, County Clare, Ireland, aged 17."