Calendar of the manuscripts of the Most Honourable the Marquess of Salisbury ... preserved at Hatfield House, Hertfordshire ..
Great Britain. Royal Commission on Historical Manuscripts; Salisbury, Robert Cecil, marquess of, 1830-1903; Roberts, Richard Arthur, 1851-1943; Salisbury, Edward, 1856-1925; Giuseppi, Montague Spencer, b. 1869; Owen, Geraint Dyfnallt