Originally, Théophile Lavallée was planned as the author of the whole book. However he died in 1866 and Hetzel asked Jules Verne to finish the work. Due to this huge validation work, Verne had to postpone the publication of Les enfants du capitaine Grant and Vingt mille lieues sous les mers.
This geographical work began in 1864 (second contract between Hetzel and Verne, dated January 1st) and was finished in 1880.
Never published, this geographical work was the result of a teamwork between Verne and Marcel. Gabriel Marcel did the documentation work between 1880 and 1886. Verne made the corrections until 1888. The work was planned to have three parts made out of two in-18 volumes each :
Article in three parts (“Encore un navire aérien”, “Tissus incombustibles”, “Machines à labourer”) published in the Musée des Familles, vol. 19, no. 9, July 1852, pp. 314-315. The article is unsigned and it’s still unsure that Verne is the author.
Article about Verne's friend, Victor Massé.
Art criticism, providing a review of the Paris Salon of that year.
Article (four chapters) published in the Musée des Familles, vol. 31, no. 7, April 1864), p. 193-208 with 2 illustrations by F. Lix and 4 by Yan’Dargent. The first edition in book form (which can be considered as the original edition) was published by Rencontre in Lausanne (Switzerland) in 1971 in a volume with Le Sphinx des Glaces.
Article published in the Musée des Familles, vol. 31, no. 3, December 1863, p. 92-93, with one illustration by Fellmann. The article was reproduced (with the illustration) in Charles-Noël Martin’s book (La vie et l’œuvre de Jules Verne, Paris, Michel de l’Ormeraie, 1978, 292 p.) and is the first edition in book form (which can be considered as the original edition).
Article published in the Journal d’Amiens — Moniteur de la Somme, no. 5102, 21 September 1873, p. 2.
Article in six chapters, written during Spring 1890. Five publications are known :
This article was first an address by Jules Verne at the Société de Géographie in Paris, 4 April 1873. This speech was held as answer to a question made by two members of the Société de Géographie who wanted an explanation how Phileas Fogg could gain a day during his trip around the world in eighty days. Jules Verne gave the scientific explanation in this speech. This is the only scientific text written by Verne. The three first publications are :
A document on the origins of the novel Voyage au centre de la Terre, written in 1876 for the judicial process against René de Pont-Jest. Published in: Bulletin de la Société Jules Verne, no. 135 (2000), p. 42-49.