Columbia subject headings:
Aqueducts--England--Shropshire.
Canals--England--Shropshire--Design and construction--History--18th century.
Telford, Thomas, 1757-1834.
Harvard subject headings:
Canals--England--Shropshire--Design and construction--History--18th century.
Shropshire Union Canal (England)
Telford, Thomas, 1757-1834
Princeton subject headings: