GrandDau Sarah Leggett - 4, Reynolds Cottages: Schedule #38; Dist 16 of Plumstead East.
Sarah Wilson - wife of George - also 4, Reynolds Cotts, Dist 16 etc, but a much higher Schedule #
No clues from the Enumerators Page describing the District.
However the Grandparents surname is close to that of this Sarah possibly marrying a George Wilson.
Marriages Mar 1875   
 
GIBLING  Elizabeth    Woolwich  1d 1056    
LECKETT  Sarah      Woolwich  1d 1056    
MUNNS  John     Woolwich  1d 1056    
WILSON  George     Woolwich  1d 1056 
Need to find the Leggetts in earlier census with hopefully a daughter Sarah born c1854, Bexley
Sadly, cant find them in the key 1861 census. No Sarah with them in 1871  ... possibly her in Service in Woolwich - RG10; Piece: 783; Folio: 19; Page: 32
sorry thisnt addressing your 'geography' question - just got interested in how/why the Leggetts and Sarah were related.