Hi Anne,
Here they are in 1901:
13 Gerald St, Pendleton
Letitia Stafford   abt 1846    Derbyshire, Head (widow)
Letitia Stafford   abt 1881    Salford, Lancashire, Daughter 
Margaret Stafford   abt 1875    Salford, Lancashire, Daughter 
Robert Stafford   abt 1872    Salford, Lancashire, Son
Also:
1891 census
13 Gerald St, Pendleton
Stafford, Letitia   abt 1844   Ridgeway, Derbyshire, seamstress (widow)
Stafford, Letitia   abt 1881   Pendleton, Lancashire, Daughter
Stafford, Louisa   abt 1870   Pendleton, Lancashire, Daughter 
Stafford, Margaret E   abt 1875   Pendleton, Lancashire, England   Daughter 
Stafford, Martha   abt 1878   Pendleton, Lancashire, England   Daughter 
Stafford, Robert   abt 1872   Pendleton, Lancashire, England   Son 
1871 census
4 Green St, Pendleton
William Stafford   abt 1841    Belper, Derbyshire, Head, butler 
Letitia Stafford   abt 1846    Ridgeway, Derbyshire, Wife 
Annie Stafford   abt 1869    Manchester, Lancashire, Daughter 
Louisa Stafford   abt 1870    Manchester, Lancashire, Daughter  
In 1861 there is a 14-year-old Letice Hardwick working as a house servant for Joseph Febron, Fox and Hounds, Eckington. Says she was born in Eckington, which is very near Ridgeway.
What was your gggrandmother’s name? There is a family of Hardwicks also at Eckington.
Cheers,
Ros