John Hamilton Gordon (Lord Aberdeen) owned and lived in Dollis Hill House, London NW2 from 1881 until 1897 where his illustrious guests included William Gladstone and Lord Randolph Churchill. (Mark Twain was later to stay at the house).
Lord Aberdeen was twice Lord Lieutenant of Ireland, in 1886 and again in the critical years 1905 to 1915 during these years he lived in the Viceregal Lodge in Dublin’s Phoenix Park, now the residence of the President of Ireland, Áras an Uachtaráin.
Incidentally, in an upstairs window of Áras an Uachtaráin, a constantly lighted lamp signifies the love and and remembrance on the island for those who leave it while welcoming them home. Maybe this is the Irish tomb of the unknown warriors?