Pickpocketing skills are employed by some magicians as a form of entertainment, either by taking an item from a spectator or by returning it without them knowing they had lost it. Borra [de], arguably the most famous stage pickpocket of all time, became the highest-paid European performer in circuses during the 1950s. For 60 years he was billed as "the King of Pickpockets" and encouraged his son, Charly, to follow in his cunning trade, his offspring being billed as "the Prince of Pickpockets".[5] Henri Kassagi [fr], a French-Tunisian illusionist, acted as technical advisor on Robert Bresson's 1959 film Pickpocket and appeared as instructor and accomplice to the main character.