Michael Gannon ~1790
~1821. Patrick Gannon was born to Michael Gannon, gentleman and Unknown wife, ?Bridget?, in Ballymoe, Galway: this from Patrick's obituary
1833. A Thomas Gannon likely born to Michael: he in 1851C in Derby with Patrick
1876. A Bridget Gannon, 67, born 1791, died at Trevor Street, off the Melbourne Road, Ballarat, Victoria- FMP & Trove. Her father was John, her mother Catherine Delaney
Cannot find a suitable Bridget Gannon in the 1841/1851 English censuses( on the assumption that son Patrick took her to Victoria with his family in the early 1850s)
Ask CFD if any evidence that this his wife