The old earl northand set himself to subdue Yorkshire; his son Hotspur west, and the earl of Douglas marched south and opened communication with the Welsh.
Six years later he was associated with his father in the wardenship of the eastern march of Scotland,, and his zeal in border warfare won the name of Hotspur for him from his opponents.
The English archers were provided with a good target in the masses of the Scottish spearmen, and Hotspur was restrained from charging by his ally, George Dunbar, earl of March.
It is related that when he arrived Henry asked for Douglas, and Hotspur demanded in return that his brother-in-law, Edmund Mortimer, should be allowed to ransom himself from Owen Glendower, with whom he was a prisoner.
Northumberland and Hotspur barred their way at Millfield, near Wooler, and the Scots were compelled to fight at Humbledon, or Homildon Hill, on the 14th of September.
During the first year of Henry's reign Hotspur further was appointed justiciar of North Wales and constable of the castles of Chester, Flint, Conway, Denbigh and Carnarvon.
This was late in 1402, and in 1403 Hotspur issued a proclamation in Cheshire stating that Richard II.
Holinshed's Chronicle was the chief source of Shakespeare's account of Hotspur in Henry IV.
SIR HENRY PERCY, called Hotspur (1364-1403), eldest son of Henry, ist earl of Northumberland, was born on the 10th of March 1364.