« Reply #6 on: Yesterday at 09:27 »
Presumably you haven't got Adelaide's surname. The 1921 census gives you age in years and months and her pob is Stoney Middleton, Derbyshire (not a big place) so you may be able to find her on a previous census with that information.
Berks / Oxon: Eltham, Annetts, Wiltshire (surname not county), Hawkins, Pembroke, Partridge
Dorset / Hants: Derham, Stride, Purkiss, Sibley
Yorkshire: Pottage, Carr, Blackburn, Depledge
Sussex: Goodyer, Christopher, Trevatt
Lanark: Scott (soldier went to Jersey CI)
Jersey: Fowler, Huelin, Scott