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