I have found Robert and Elizabeth were married on 10 April 1823 in Family Search. But names are spelt differently - not uncommon I believe. Robert SWIRE was born about 1796 in Kirkham,Lancs. and Elizabeth HARDMAN about 1802, also in Kirkham.They had 2 children, Charles Robert, 1825 , who married Clara Ellen Hall in Melbourne in 1858 and Matilda who married Robert Sellar in Melbourne in 1859. The names were spelt as SWYER and HARDIMAN on Charles Robert's marriage certificate.
Clara Hall remarried Richard Moore Treacy in 1882.
Charles Robert was a civil engineer, migrated from Eccles, near Manchester and arrived in Victoria in 1852 and worked in railway surveys and construction, and as an architect and engineer, before being appointed to Provincial Engineer in New Zealand in 1862
Does anyone know any more about Robert and Elizabeth Swyer?