Hi......only found one Culverhouse in L/Buzzard according to surname index.
1851 census
North St, Leighton Buzzard.
Mary Culverhouse, Head, U, 66, Annuitant, Bds, Clipstone, Eggington.
Ann Duncombe, Servant, U, 20, Household servant, Bds, L/Buzzard.
Had a look at nearby villages and found the following:-
1851 census Eggington
The Village
John Culverhouse, Head, M,32, Ag/Lab, Bds, Eggington
Martha Culverhouse, Wife, M, 34, S/ Plaiter, Bks, Cublington
Thomas Culverhouse, Son, 11, S/Plaiter, school, Bks, Wing
Samuel Culverhouse, son, 10, ditto, ditto, ditto
Mary Culverhouse, dau, 8, ditto, ditto, Bds, L/Buzzard
Elizabeth Culverhouse, dau, 5, ditto, ditto, Bds, Eggington
Barnard Culverhouse, son, 3, ditto
Triphena Culverhouse, dau, 10 mon, ditto
The Village
James Kempson, Head, M, 50, Ag/Lab, Bds, Totternhoe
Mary Ann Kempson, Wife, M, 43, St/Plaiter, Bds, Eggington
Mary Kempson, dau, U, 17, ditto, ditto
Sarah Kempson, dau, U, 14, ditto, ditto
Martha Kempson, dau, 11, St/Plaiter, school, ditto
Emma Kempson, dau, 6, ditto, ditto, ditto
Jane Kempson, dau, 1, ditto
Thomas Culverhouse, father/law, 72, Parish relief, formerly farmer,
Bks, Wing.
Leighton Buzzard runs into Linslade of which you may already be aware ..........Linslade in Bucks.
Anyway this may be of use, Waterfall