Robert Harley, 1st Earl of Oxford and Earl Mortimer
Edward Harley, 2nd Earl of Oxford and Earl Mortimer
Robert Harley, 1st Earl of Oxford by Sir Godfrey Kneller, Bt (2).jpg
Member of Parliament in the Parliament of England
Secretary of State for the Northern Department
member of the 1st Parliament of Great Britain
Robert Harley (1661–1724), 1st Earl of Oxford
Robert Harley (1661–1724), 1st Earl of Oxford and Mortimer
Dictionary of National Biography, 1885–1900
Brockhaus and Efron Encyclopedic Dictionary
National Library of Israel Names and Subjects Authority File