Extracts from The Last Knight Errant for the phrase 60 miles.
But it is far from proven and still left Edward Plantagenet, Clarence's son, as senior in line to Richard, although it might be argued that he was disqualified by his father's attainder. On the point of legitimacy, it has been argued that Edward's father was away campaigning at Pontoise when he should have been fathering Edward. Maybe, but the Duchess was at Rouen, and Pontoise is only 60 miles away, no more than a hard day's ride.