On 22 Jun 1402 Owain ap Gruffudd "Glyndŵr" Mathrafal Prince Powys (age 43) defeated the army of Edmund Mortimer (age 25) at Knighton, Radnorshire [Map], who was captured, at the Battle of Bryn Glas.

King Henry IV of England (age 35) made no attempt to ransom Edmund Mortimer (age 25) and, as a consequence, Edmund Mortimer (age 25) changed his allegiance, and subsequently married Owain's (age 43) daughter.

On 25 Jun 1402 Walter Devereux (age 41) died from wounds.