Columbia subject headings:
Canals--England--London--Pictorial works.
Canals--England--London.
London (England)--Description and travel.
London (England)--Pictorial works.
Thames River (England)--Pictorial works.
Harvard subject headings:
Canals--England--London--Pictorial works.
City and town life--England--London.
London (England)--Description and travel--Pictorial works.
London (England)--Description and travel.
Princeton subject headings:
Canals--England--London--Pictorial works.
Canals--England--London.
London (England)--Description and travel--Pictorial works.
London (England)--Description and travel.