From A Bibliography of Alexandre Dumas père by Frank Wild Reed: Another series of "Impressions de Voyage." The journey from which this sprang took place between August and November, 1838. Gérard de Nerval is thought to have aided Dumas with it.
Original edition : Paris, Dumont, 1841, 3 vols., 8vo.
It now forms two volumes of the standard Calmann-Lévy edition, and one of their "Musée Littéraire."
It is in Vol. XXI. of Le Vasseur's "Alexandre Dumas Illustré."