Derreen Garden lies on a promontory in Kilmakilloge Harbour on the Beara Peninsula, in Tuosist parish, near Kenmare in County Kerry (Republic of Ireland). Henry Petty-Fitzmaurice, 4th Marquess of Lansdowne (1816–1866) initiated the planting of the garden in 1863, but it was his son, Henry Charles Keith Petty-FitzMaurice, 5th Marquess of Lansdowne (1845–1927), who...