The group which toils and vegetates in the old quarter is not so clearly defined as the others. The labouring classes are here in a majority; but retail dealers and even a few wholesale traders are to be found among them. As a matter of fact, Plassans is far from being a commercial centre; there is only just sufficient trade to dispose of the products of the country—oil, wine, and almonds. As for industrial labour, it is represented almost entirely by three or four evil-smelling tanyards, a felt hat manufactory, and some soap-boiling works, which last are relegated to a corner of the Faubourg. This little commercial and industrial world, though it may on high days and holidays visit the people of the new district, generally takes up its quarters among the operatives of the old town. Merchants, retail traders, and artisans have common interests which unite them together. On Sundays only, the masters make themselves spruce and foregather apart. On the other hand, the labouring classes, which constitute scarcely a fifth of the population, mingle with the idlers of the district. It is only once a week, and during the fine weather, that the three districts of Plassans come together face to face. The whole town repairs to the Cours Sauvaire on Sunday after vespers; even the nobility venture thither. Three distinct currents flow along this sort of boulevard planted with rows of plane-trees. The well-to-do citizens of the new quarter merely pass along before quitting the town by the Grand’-Porte and taking the Avenue du Mail on the right, where they walk up and down till nightfall. Meantime, the nobility and the lower classes share the Cours Sauvaire between them. For more than a century past the nobility have selected the walk on the south side, which is bordered with large mansions, and is the first to escape the heat of the sun; the lower classes have to rest content with the walk on the north, where the cafes, inns, and tobacconists’ shops are located. The people and the nobility promenade the whole afternoon, walking up and down the Cours without anyone of either party thinking of changing sides. They are only separated by a distance of some seven or eight yards, yet it is as if they were a thousand leagues away from each other, for they scrupulously follow those two parallel lines, as though they must not come in contact here below. Even during the revolutionary periods each party kept to its own side. This regulation walk on Sunday and the locking of the town gates in the evening are analogous instances which suffice to indicate the character of the ten thousand people inhabiting the town. Here, amidst these surroundings, until the year 1848, there vegetated an obscure family that enjoyed little esteem, but whose head, Pierre Rougon, subsequently played an important part in life owing to certain circumstances.