Report on the correspondence and papers of Theresa Susey Helen Vane-Tempest-Stewart, Marchioness of Londonderry (1856-1919)
Northern Ireland.Public Record Office.
London Royal Commission on Historical Manuscripts for the Public Record Office of Northern Ireland
1983
"No. 83/4."
Vane-Tempest-Stewart, Theresa Susey Helen Marchioness of Londonderry, 1865-1919