The house that helped him to the crown was the Percys of the north. Northumberland and his son Hotspur had led it. A few years into the new reign the two houses fall out.
There were several reasons. There was an order about handing over prisoners, and a refused request for a ransom. But what lay under it was simpler. The one who set a man up and the one who sits in the place do not last long together.
Richard had said something to Northumberland on the way to Pomfret. The man who helps change a king will fall out with the new one for certain. That happens in this chapter exactly so.