See the concise, but correct and original, work of D'Anville, (Etats Formes en Europe apres la Chute de l'Empire Romain en Occident, Paris, 1771, in 4to.,) whose map includes the empire of Charlemagne; the different parts are illustrated, by Valesius (Notitia Galliacum) for France, Beretti (Dissertatio Chorographica) for Italy, De Marca (Marca Hispanica) for Spain. For the middle geography of Germany, I confess myself poor and destitute.