Columbia subject headings:
Harvard subject headings:
Fortification, Roman--Scotland.
Great Britain--History--Roman period, 55 B.C.-449 A.D.
Romans--Scotland
Scotland--Antiquities, Roman.
Princeton subject headings:
Fortification, Roman--Scotland.
Great Britain--History--Roman period, 55 B.C.-449 A.D.
Romans--Scotland.
Scotland--Antiquities, Roman.