Cacambo is sent with some of that fortune to buy the freedom of a slave from Don Fernando, but that slave is later found in Constantinople.  
In this work, Vanderdendur steals much of the protagonist's fortune, but his ship later sinks.  Cacambo is sent with some of that fortune to buy the freedom of a slave from Don Fernando, but that slave is later found in Constantinople.  Earlier the protagonist had killed the Jew Don Isaachar and the Grand Inquisitor of (*) Lisbon.  The title character's teacher contracts syphilis from Paquette and believes that we live in the best of all possibly worlds, Pangloss, and much of the story is spent in search of a woman who was raped by the Bulgars and sold into several kinds of slavery, Cunegonde.  For 10 points, name this work by Voltaire.
In this work, Vanderdendur steals much of the protagonist's fortune, but his ship later sinks.  
{Candide}