Columbia subject headings:
Natural history--England--Northamptonshire.
Northamptonshire (England)--Antiquities.
Northamptonshire (England)--Genealogy.
Northamptonshire (England)--History.
Harvard subject headings:
Northamptonshire (England)--Genealogy.
Princeton subject headings:
Natural history--England--Northamptonshire.
Northamptonshire (England)--Antiquities.
Northamptonshire (England)--Genealogy.
Northamptonshire (England)--History.