From A Bibliography of Alexandre Dumas père by Frank Wild Reed: PEPIN. CHRONIQUE DU ROI PÉPIN. CHARLEMAGNE. CHRONIQUE DE CHARLEMAGNE. GUELFES ET GIBELINS. LE SIRE DE GIAC. LA MAIN DROITE DU SIRE DE GIAC.
Of these four pieces, the first two are chronicle stories, the third must be classed as history, and the last is purely fiction, though in an historical setting, and quite good of its kind. The "Sire de Giac" is in tact really a sequel to certain chapters in the latter portion of "Isabel de Bavière."
"Charlemagne" first appeared with "Lyderic," as the "Chronique de Charlemagne." Later, under this latter title, it was used to complete the fourth and final volume of "Le Trou de l'Enfer." An illustrated edition was issued in 1856. (Refer to page 144.)
"Pépin," as the "Chronique du Roi Pépin," first appeared with "Lyderic " (refer to page 144.)
"Guelfes et Gibelins" was published in the "Revue des Deux-Mondes" in the No. for March 1st, 1836 (see page 97).
"Le Sire de Giac," as "La Main Droite du Sire de Giac," was first issued in Vol. II. of the "Dodecaton" (1836). then was used to fill out the last volume of "Le Capitaine Paul," and next, as one of the stories used to complete the final volume of "La Guerre des Femmes," it appeared in Vol. II. of "L'Abbaye de Peyssac."
Original edition of "Les Hommes de Fer;" Paris, Michel Lévy Frères, 1 vol., 12mo., 1867.
It now forms one volume in the standard Calmann-Lévy edition, while in their illustrated series "Charlemagne" and "Le Sire de Giac" are found in different volumes.
In Le Vasseur's "Alexandre Dumas Illustré" it forms, complete, part of Vol. VIII.
References :— Parran: "Bibliographie d'Alex. Dumas," page 69. Glinel: "A. Dumas et Son Œuvre," page 470.
English Translations :—
"Pepin" (in "Maitre Adam") ; London. Methuen, sewed. 1906. Reprinted, same firm, 18mo., 1922.
"Guelphs and Ghibellines" and "The Kings Favourite" ("Le Sire de Giac") are found in "The Convict's Son;" London. Methuen, sewed, 1905. Reprinted, same firm, 18mo., 1922.