Columbia subject headings:
Harvard subject headings:
Bridges--England--Hadrian's Wall.
England--Antiquities, Roman
England--Antiquities.
Excavations (Archaeology)--England--Hadrian's Wall.
Fortification, Roman--England--Hadrian's Wall.
Fortification--England
Great Britain--History, Military--55 B.C.-449 A.D.
Hadrian's Wall (England)
Romans--England--Hadrian's Wall.
Princeton subject headings:
Bridges--England--Hadrian's Wall.
England--Antiquities, Roman.
Excavations (Archaeology)--England--Hadrian's Wall.
Fortification, Roman--England--Hadrian's Wall.
Hadrian's Wall (England)
Romans--England--Hadrian's Wall.