Mary Smith was born on 19 May 1774 in Westminster, London, England as the first child of John Smith and Elizabeth.

Mary Smith married David Knowland.

Mary Smith and David Knowland had the following children:

1. Mary Anne Knowland was born on 05 November 1809 in Windsor, New South Wales, Australia. She married Daniel Ryan in 1827 in St Peter's Church of England, Campbelltown, New South Wales, Australia. She died in 1879 in Braidwood, New South Wales.

Mary Smith married Edward Mellon. They had no children.

Mary died in 1824 in Sydney, New South Wales.

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