text:  Michelet in his _Gaule sous les Romains_ a most able and interesting work--Thierry in his _Domination Romaine en Gaule_ and his _Histoire des Rois Merovingians_--Sismondi in the three first volumes of his _Histoire des Francais_--and Guizot in his _Civilisation Europeenne_ and the first volumes of his _Essais sur l'Histoire de France_--have applied their great powers to this most interesting subject