Just for reference - 1891 census for Hampshire
John Wills 35 cowman b Yeovil
Caroline 28 dairywoman b Batcombe Dorset
Frederick 5 b Leigh - Dorset
James 3 b Yeovil
Percy 1 b Carisbrooke IOW
Ellen Hall 14 nursemaid b IOW
RG12; Piece: 897; Folio 14; Page 7
Did you get Caroline's maiden name from one of the children's birth certs or from this submitted IGI entry -
www.familysearch.orgPercy George Wills Birth: 29 MAR 1890 Carisbrooke, Hampshire,
Death: 18 AUG 1979
Father: John Wills Mother: Caroline Bartlett
I also found this christening on Ancestry
Henry James Wills Birth Date: 31 Mar 1888
Christening Date: 27 Mar 1892 Brixton, Hampshire
Age at Christening: 3yrs
Father's Name: John Wills
Mother's Name: Caroline