"Throughout history, security as much as status has been an obstacle to summitry. In 1419 France was in turmoil from war with the English and a power struggle provoked by the periodic insanity of King Charles VI. On September 10 the dauphin, Charles’ son, conferred on a bridge near Rouen with their archrival, John, Duke of Burgundy. Both men were well attended by guards and a barrier had been erected in the middle, with a wicket gate bolted on either side to allow passage only by mutual consent. During the conference Duke John was persuaded to come through the gate—only to be cut down by the dauphin’s bodyguard. The dauphin, inheriting the throne as Charles VII, recovered much of France from the English. When his son, Louis XI, met the Yorkist king Edward IV at Picquigny near Amiens in 1475 to conclude a peace treaty, the fate of Duke John was much in mind. The chronicler Philippe de Commines tells how this conference was held on a bridge over the Somme. Louis insisted that across the middle of the bridge and along its sides his carpenters should build "a strong wooden lattice, such as lions’ cages are made with, the hole between each bar being no wider than to thrust in a man’s arm." The two kings somehow managed to embrace between the holes and conducted their meeting in secure cordiality."