The children of Algernon George Percy, 6th Duke of Northumberland and his wife, Louisa Harcourt Wortley. Standing: Lord Henry George Percy (1846-1918), later 7th Duke of Northumberland. Seated: Lord Algernon Malcolm Arthur Percy (1851-1933).

The sitting appears in the daybooks as the 'children of Lord Lovaine'. Lord Lovaine was the courtesy title of the Duke of Northumberland before he succeeded his father.