Explain Florent's escape from Devil's Island and his journey back to Paris.

Having escaped from Cayenne, after wandering through the jungles of French Guiana for two years, it takes Florent quite a long time to eventually make his way back to France. Florent first arrives a the port of Le Havre. From there, with only fifteen francs tied into a corner of his raggedy handkerchief, he buys himself a ticket on the coach to Rouen. From Rouen, Florent must continue on foot. When he reaches the town of Vernon, he spends his last thirty sous on a small amount of bread. From Vernon, Florent walks the rest of the way to Paris. Overcome by hunger and fatigue, Florent passes out when he reaches Courbevoie, approximately five miles from the center of Paris. By the time Florent comes around, he is in Madame Francois' wagon arriving at Les Halles