Hope that these are yours
Every single one is indexed as Bo
nser, as indeed Henry is in the 1891 and 1901 census. There is a birth registered 1859 for a Sophia Dudley Bonser at FBMD which would fit and family search has her as the daughter of Thomas Bonser and Sophia Dudley so everything points to this being the Bonser family rather than Bouser as you requested.
Overend,Elton,Northamptonshire
(indexed as Bonser)
Thomas B,head,m,35,farmer of 27 acres employing 6 men and 3 boys,Nottinghamshire,Widmerpool?
Sophia D,wife,m,42,Northamptonshire,Fotheringhay
James B,son,12,scholar,ditto
Henry B,son,9?,scholar,ditto
John B,son,7,scholar,Northamptonshire,Woodnewton
Thomas B B,son,6,scholar,Hunts,Elton
Charles W B,son,4,scholar,ditto
Sophia D B,dau,1,ditto
James B,brother,m,45,formerly farmer,Leicestershire,Wyforby?
Sophia Newton,serv,u,20,cook domestic serv,Northamptonshire,Stoke Doyle
Phoebe Winters,serv,unm,16,general serv,Hunts,Chesterton
Mary Berridge,governess,u,18,governess,Northamptonshire,Yarwell?
Hannah Dudley,charwoman,m,46,charwoman,Northamptonshire,Caistor
RG9/963-156
1871
Minster Precinct
Court House
(Indexed as Bonser)
Elizabeth B,pupil,12,scholar,Northants,Fotheringhay
Sophia D B,pupil,11,scholar,Hunts,Elton
Annie ? B,pupil,9,scholar,Hunts,Elton
RG10/1516-116
1871
Elton
(indexed as Bonser)
Thomas B,head,w,45,farmer,276 acres,4 men,2 boys,Notts,Widinerpool
Thomas B,son,16,scholar,Hunts,Elton
Charles B,son,14,scholar,ditto
Elizabeth Hartly,neice,u,21,housekeeper,Northants,Fotheringhay
Sarah Eanden?,serv,u,21,gen serv,Northants,Woodnewton
RG10/1513-10
1871
22 Market Pl,St Martins,Leicester
Henry B,shopman,u,19,drapers assistant,Northamptonshire,Wood Newton
John Bouser,shopman,17,drapers assistant,ditto
(In household of Leslie D??? Draper from Scotland)
RG10/3288-49
1901
7 Kedleston Rd,Derby
Henry B,head,m,49,Drapery commercial traveller,Northamptonshire,Fotheringhay
Elizabeth B,wife,52,Lincs,Boston
Lizzie B,dau,s,27,Notts,Nottingham
Frederick A? B,son,s,25,drapery commercial traveller,ditto
Sophia E B,dau,22,ditto
Henry B,son,16,gents outfitters apprentice,Derbyshire,Derby
RG13/3222-80
(I think the 1891 entry also says Kedleston Rd, same address as here)