Polyandre (1648), Charles Sorel's unfinished novel, deconstructs the picaresque schema which traditionally operates in seventeenth century comic novels. Sorel, in the preface which accompanies the last avatar of his comic trilogy, develops an aesthetic of diversity based on naturalness. An urban pícaro, Polyandre, a middle-aged man back in Paris after a provincial interlude, abandons the formative aspect of the ‘Grand Tour’ in favour of the art of perambulation. A bourgeois novel, depicting the life of the most varied and mediocre figures, Polyandre is also an impressive account of the topography of Paris and social archetypes circulating inside this burlesque geography. In fact, Polyandre's wanderings act as an aggregator of typified characters: the picaresque character, conventionally defined by his social mobility and his moral permeability, becomes, by comic transposition, a vagrant and a judge. But these burlesque shifts are also a metaphorical expression of the very function of comic novels, which is to be a social laboratory.