Could she be the Mary Bansston recorded aged 20 in Little Marsden Whalley in the 1841 census? She is a weaver living with the Berry family.
Someone has already suggested on Ancestry that she is Mary Bannister.
connected?
Marriage: 27 Dec 1813 St Bartholomew, Colne, Lancashire, England
Joseph Berry - (X), Weaver, this Chapelry
Betty Banister - (X), Spinster, this Chapelry
Married by Banns