Columbia subject headings:
Harvard subject headings:
Canals--Great Britain--Design and construction--History--18th century.
Civil engineers--Great Britain--Professional ethics.
Jessop, William, 1745-1814.
Telford, Thomas, 1757-1834--Ethics.
Princeton subject headings:
Canals--Great Britain--Design and construction.
Canals--Great Britain--History.
Jessop, William, 1745-1814.
Telford, Thomas, 1757-1834.