De Grey asked Glyndŵr to a meeting, but arrived with a large force, and attempted to capture Glyndŵr. Glyndŵr escaped and went into hiding, becoming a traitor in English eyes. King Henry took the land of Glyndŵr's friends, and gave them to John Beaufort, his half-brother. The rebellion spread across Wales by 1402. Lord Grey was taken prisoner by Glyndŵr's forces in an ambush near Ruthin in January. 