William married his first wife 5 January 1826 - Mary Ann Holmes - she died 23 March 1831. William married a second time to Frances Tree Tatlock on 24 January 1832. The Revd. William Mitchell had been twice to India as a missionary employed by the Church Missionary Society. All children by his first marriage were born there. He married again and returned to India where two of the second family were born. Blaney his first child by his second wife - b 12 November 1832; Nasik, India; died 1833. He resigned from the Church Missionary Society and was then employed by the Australian Missionary Society in 1838. He came to the Swan River Colony with his family to establish All Saints and St Mary's Churches on the Swan. He became the first rector of the Swan Parish as from 1842. He served 20 years on the Swan and then became Padre of the prison in Perth, with the family living at the Deanery. He died 3 August 1870 at Perth. His family all settled in Western Australia, and they in turn became pioneers of various districts. More detail can be found in the book 'Mitchell Amen' by Frank N Greenslade.