The first of them was L’Épave du Cynthia (The Salvage of the Cynthia, 1885) and the last was L'Étonnante aventure de la mission Barsac (The Barsac Mission, 1919).
Das erste davon war L’Épave du Cynthia (1885) und das letzte L'Étonnante aventure de la mission Barsac (1919).