Columbia subject headings:
Great Britain. Royal Navy--History--19th century.
Marine engines--History--19th century.
Warships--Great Britain--History--19th century.
Harvard subject headings:
Great Britain. Royal Navy--History--19th century.
Great Britain. Royal Navy--History.
Marine engines--History--19th century.
Warships--Great Britain--History--19th century.
Warships--Great Britain--History--20th century.
Princeton subject headings:
Great Britain. Royal Navy--History.
Naval architecture--History--19th century.
Warships--Great Britain--History--19th century.