Henry IV, King of England 1399-1413; b. Bolingbroke Castle, Lincs. 3 Apr 1367; d. Westminster Palace, 20 Mar 1412/3; m. Rochford, Essex, between 30 July 1380 and 10 Feb 1380/1, Mary de Bohun, daughter and coheir of Humphrey de Bohun, Earl of Hereford, Essex, and Northampton. She was b. 1368/9; d. Peterborough, Northants 4 July 1394. [Ancestral Roots]
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Henry IV, also called (1377-97) Earl of Derby, or (1397-99) Duke of Hereford, byname Henry Bolingbroke, or Henry de Lancaster (b. April? 1366, Bolinbroke Castle, Lincolnshire, England--d. 20 Mar 1413, London), king of England from 1399 to 1413, the first of three 15-century monarchs from the House of Lancaster. He gained the crown by usurpation and successfully consolidated his power in the face of repeated uprisings of powerful nobles. At the same time he was unable to overcome the fiscal and administrative weaknesses that contributed to the eventual downfall of the Lancastrian dynasty. [Encyclopaedia Britannica]
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Following copied from Barry Hummel, Jr, World Connect db=siderhummel, rootsweb.com:
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Henry IV (reigned 1399-1413) spent much of the early part of his reign fighting to keep control of his lands. Exiled for life by Richard II in 1399, Henry's successful usurpation did not lead to general recognition of his claim (he remained unrecognised as King by Charles VI of France).
An outbreak of the plague in 1400 was accompanied by a revolt in Wales led by Owen Glendower. In 1403, Henry's supporters, the Percys of Northumberland, turned against him and conspired with Glendower - the Percys and the Welsh were defeated by Henry at the Battle of Shrewsbury. This victory was followed by the execution of other rebels at York (including the Archbishop in 1405). By 1408 Henry had gained control of the country. Henry was dogged by illness from 1405 onwards; his son played a greater role in government (even opposing the King at times). In 1413, Henry died exhausted, in the Jerusalem Chamber at Westminster Abbey.