Father James was the farmer, son James does not seem to have inherited the farm
Census info for you:
1841 HO107/407/6 4 p3 Duke's Farm, parish of Northwood
James Jenkins 50 Yeoman born in county
Kezia 75 not born in county
William Jenkins 20 Ag Lab born in county
separate household, but same reference.
James Jenkins 25 Ag lab born in county
Frances Jenkins 25 born in county
John Jenkins 4 born in county
James Jenkins 2 born in county
1851: HO107/1662/15 p2 Duke's Farm Northwood
James Jenkins Head 64 Farmer of 70 acres employing 3 labourers b Newport
Kezia wife 80 b Everley Wiltshire
James Jenkins 36 marr Farmer's son b Wootton
William Jenkins unmarr 30 Farmer's son b Northwood IOW
Fanny Jenkins 37 son's wife, b Northwood
John Jenkins 14 grandson Ag lab b Northwood
James Jenkins 11 grd son general servant b Northwood
Mary A Jenkins 8 grand daughter scholar b Northwood
Clara Jenkins grand daughter 5 scholar b Northwood
Henry Jenkins grd son 3 b Northwood
Sarah Jenkins grd daughter 3 months b Northwood
By 1861 James junior is a woodman, living at Tinkers Lane Northwood.
RG9/652/21 p3
James Jenkins Head 47 Woodman b Wootton
Frances wife 47 b Northwood (!)
John son 24 shipwright b Northwood
James son 22 Apprentice shipwright b Northwood
Henry son 13 ag lab b Northwood
Sarah Jane daughter 10 scholar b Northwood
William son 8 scholar b Northwood
Kezia seems to have died aged 104 in 1870, but I've no idea where she and James were in 1861. James died in 1862 aged 78, leaving a will (HRO catalogue indicates that he was now a gardener). James junior the woodman died in 1870.
Nell