He was an Admiral in the Royal Navy .
Another member of the family to gain distinction was Henry Blackett ( 1867 -- 1952 ) , son of John Charles Blackett , fourth son of the fourth Baronet .
Henry Blackett was an son in the Royal Navy .
Another member of the family to gain distinction was Henry Blackett ( 1867 -- 1952 ) , son of John Charles Blackett , fourth son of the fourth Baronet .