Ok, I am going to have a stab at this

Peregrine HARDY/Elizabeth JENNER married 18/10/1804
1841 Census;
Farm
Scoulton,Norfolk
Peregrine HARDY, 66 ( born circa 1775)
Eliz., 66
Wm (William), 26
Jas (James), 25
Peregrine , 6
As no relationships are shown would guess that Perry aged 6 would be grandson and his parents Peregrine and Martha Ann Hardy nee Goldson.
IGI has birth of a Peregrine Hardy, Carbrooke, parents Peregrine and Mary Ann (submitted)
I would think that possibly William and James could be grandsons also or born when P and Eliz. were in their 40's??
There is also a possibility that Eliz. was a second wife as would have been aged 30ish when they married 1805.
I will look into this more and see what I can find from Censuses.
Trish