1871 census says this:
Reference RG10, Piece 742, Folio 13, Page 19
Addey Street, Deptford, Kent
Reed, Ruben Head M 36 Coal Porter b Marshfield, Sussex
Reed, Mary Jane Wife F 29 House keeper b Norfolk (sorry! can't read the town name!)
Reed, Sarah Jane Daughter F 5 b Greenwich, Kent
Looks like her mother died?
Deaths June 1879
Dartford district Vol 2a, page 255
Reed, Mary Jane age 36
(Dartford covers Gravesend)
By 1881, Sarah Jane is in service in Pancras.
Reference RG11, 212, 72, 5
20 Rochester Road, St Pancras, Midlesex
Pipe, William Head M 52 Upholsterer b Suffolk
+ daughrt & grandson
Reed, Sarah J Servant F 15 Somestic Servant b East Greenwich, Kent