Columbia subject headings:
Canning, Charlotte, Countess Canning, 1817-1861.
Louisa Anne, Marchioness of Waterford, 1818-1891.
Harvard subject headings:
Canning, Charlotte, Countess Canning, 1817-1861
Louisa Anne, Marchioness of Waterford, 1818-1891.
Waterford, Louisa Anne Stuart De la Poer, marchioness of, 1818-1891.
Princeton subject headings: