Mary Cunningham was born in Roscommon, Ireland in 1823. Mary Cunningham was tried at Roscommon in Roscommon County, Ireland on the 28th of December 1849 and convicted of killing a calf the property of Mr. McMahon of Roscommon and was sentenced to be transported for seven years.
Her brother Martin Cunningham was also convicted at the Roscommon Quarter Sessions on the 28th December 1849 of killing a heifer, the property of Mr. Martin McManus.
Both Mary and Martin were transported to Van Diemens Land for seven years.
On the 29th Nov 1852 at St. Georges Church of England, Hobart, Mary Cunningham married convict Peter Crilly aka John Duncan.
Mary and John had four daughters and Mary died in 1888 in Waratah, Tasmania of Uterine cancer at the age of sixty five.