As to the whereabouts of Jack Shaftoe: no one knows this, though Father Édouard de Gex and Monsieur Bonaventure Rossignol have devised a scheme to ferret him out. One of the members of his pirate-band writes letters, from time to time, to his family in France. These letters are intercepted and read by Monsieur Rossignol, who, however, is unable to extract all of their meaning, as they are written in an impenetrable code. He makes copies of them and passes them on to the family.