Pg 687 Pedigree: Henry, Earl of Derby, cr. Duke of Hereford 1397, later Henry IV54947

Pg 9 Henry Plantagenet of Bolingbroke, Duke of Lancaster, Duke of Hereford, Earl of Derby, Earl of Lincoln and Earl of Leicester, High Steward of England, also Duke of Aquitaine in Normandy. ... having on 3 Feb 1398/9, suc. his father, as Duke of Lancaster, & c., he returned to England and was 30 Sep 1399, elected King thereof as Henry IV.17383

Pg 205 10 Henry IV of England (of Bolingboke), K.G., Earl of Hereford & Northampton jure uxoris. He was created Duke of Hereford 29 Sep 1397. Very soon afterwards began a quarrel with Thomas Mowbray, Duke of Norfolk, which was ended in the banishment of both Dukes in Sep 1398. On his father's death Feb 1399, Henry succeeded him as Duke of Lancaster, Earl of Lincoln and Leicester & the banishment was rescinded. He returned to England at the end of Jun and deposed his cousin, King Richard II. He was declared King of England on 13 Oct 1399.17384

Vol 22 Image609of1511 Pg 601 Henry IV, King of England17387

Vol 1 Image306of318 Henry IV, King of England17388

Pg 487 Henry Plantagenet, Earl of Derby60933
Pg 489 Henry, Earl of Derby, afterwards Henry IV, King of England

Pg 57 Henry IV, King of England17389
Pg 273 Henry IV, King of England

Pg 127 Henry IV, King of England17798