Columbia subject headings:
English language--Dialects--England--London.
English language--Middle English, 1100-1500--Dialects--England--London.
Harvard subject headings:
English language--Dialects--England--London
English language--Middle English, 1100-1500
Princeton subject headings:
English language--Dialects--England--London.
English language--Middle English, 1100-1500.