HENRY III. 1216-1272 | --------------------------------- | | EDWARD I. Edmund 1272-1307 | | ---------------------- | | | EDWARD II. Thomas, Henry, 1307-1327 Earl of Lancaster Earl of Lancaster | | EDWARD III | 1327-1377 | | | -------------------- | | | Henry, Duke of Lancaster Edward, Lionel, | the Black Prince Duke of Clarence Blanche = John of Gaunt, | | | Duke of RICHARD II. Philippa = Edmund Mortimer, | Lancaster 1377-1399 | Earl of March | | | Roger Mortimer, HENRY IV. Earl of March 1399-1413 | Edmund Mortimer, Earl of March] [Illustration: Effigy of a knight at Clehonger, showing development of plate armour. Date, about 1400.]