Columbia subject headings:
Agriculture--Great Britain--History--19th century.
Farms--Great Britain--History--19th century.
Harvard subject headings:
Agriculture--Great Britain--History--19th century.
Farm buildings--Great Britain--History--19th century.
Farms--Great Britain--History--19th century.
Princeton subject headings:
Agricultural machinery--Great Britain--History--19th century.
Agriculture--Great Britain--History--19th century.
Farms--Great Britain--History--19th century.