Per the 1901 census, Mary Jane was born in Stockton.
England & Wales, FreeBMD Birth Index: 1837-1983
Name: Mary Jane Marshall
Year of Registration: 1880
Quarter of Registration: Apr-May-Jun
County: Durham, Yorkshire - North Riding
The 1891 census in Stockton On Tees shows her as a lodger in the home of John Griffin.
All listed as lodgers in the home are:
William Marshall 32
Catherine " 32
Hannah " 14
Mary J " 11
Margaret " 6
Mary " 4
Edith " 1
The 1881 shows William and Catherine in Stockton with daughters Hannah, 4 & Mary J, 1.
William Swinhoe married Catherine Robinson Sep 1876, Q3, Sunderland.