Looking at Joseph CAPPER c 1806 - on the various census he says he was born in Highleadon, (also Rudford) which is in the FOD area...

1871 Gloucesteshire Lassington.

Lassington Hill

Joseph CAPPER - Head, married 65, Gamekeeper, born Gloucestershire, Highleadon
Esther CAPPER - wife - married 67, born Gloucestershire, Minsterworth
Elizabeth CAPPER - daughter - unmarried 34, born Lassington
Winifred CAPPER - grand dau age 11 born Lassington
Anne CAPPER - grand dau - age 4 - born Lassington

In my email to you Dan, I explained that as Joseph CAPPER was a Gamekeeper - his name may appear in the Gloucestershire Index to the series of Gamekeeper's deputation which appear in the Quarter Sessions Order Books, (held from 1711 to 1889) held at the Gloucestershire Records Office - this is how I found out my WICKENDEN gamekeeper movements.

FOD records

Joseph CAPPER, 20 December 1806 - parents William & Elizabeth CAPPER - Rudford