Columbia subject headings:
Harvard subject headings:
Cooper family.
Fisher family.
Humber River Valley (Ont.)--Economic conditions.
Humber River Valley (Ont.)--History.
Mills and mill-work--Ontario--Humber River Valley--History.
Wadsworth family.
Princeton subject headings:
Humber River Valley (Ont.)--Economic conditions.
Humber River Valley (Ont.)--History.