Columbia subject headings:
Architecture, Colonial--Connecticut River Valley.
Architecture--Connecticut River Valley--Details.
Connecticut River Valley.
Doorways--Connecticut River Valley.
Harvard subject headings:
Decoration and ornament--Connecticut River Valley--History--18th century.
Doorways--Connecticut River Valley--History--18th century.
Doorways--Connecticut.
Doorways--Massachusetts.
Dwellings--Connecticut River Valley.
Historic buildings--New England--Guidebooks.
Princeton subject headings:
Architecture, Modern--18th century.
Architecture--Connecticut River Valley.
Connecticut River Valley--Historic houses, etc.
Doorways--Connecticut River Valley.