"Vita di San Giovanni Gualberto," the "Cronache di San Dionigi" (an Italian translation of which was printed--1476--before the original text), and the "Libro del Conquisto d'Oltremare," which was a history of the Crusades, translated from the French into almost every other language during the Middle Ages.[43] That Villani is a very valuable authority in Florentine history dating from the end of the thirteenth century, is a fact well known to all, and need not be discussed here. As to the origin of the city, he has little that is genuinely historical to tell us. His accounts begin, as usual, from 1080, are more or less identical with those disseminated by other writers, not unfrequently charged with the same blunders, and often in the same words. This singular resemblance between many of the Florentine chroniclers when treating of early times, and remarked upon later, was easily explained so long as it was taken for granted that some chroniclers had copied from others. But when it could be proved, as was often the case, that the same resemblance existed even between totally independent writers, the problem was not so readily solved. For this reason, Prof. Scheffer-Boichorst, in noting the fact, after impartial and keen investigation, suggested the theory that all the different chroniclers had drawn from some common source, of which nothing was now known. Seeing that Tolomeo of Lucca, whose Annals were already concluded before Villani began to colour his design, often quotes from "Gesta" and "Acta Florentinorum," "Gesta" and "Acta Lucensium," the German critic assigned the name of "Gesta Florentinum" to what, in his opinion, must have been the original source used by all the chroniclers of Florence down to the beginning of the fourteenth century. This hypothesis became generally accepted as the most probable explanation of a fact that was otherwise inexplicable. But when attempts were made to precisely define the nature and limits of the "Gesta"--to define, not only its language, but in which year it was begun, in which ended, together with the style and exact character both of the work and its author--the question then stood on very disputable ground. Accordingly, I will leave discussions of this kind on one side, as beyond the sphere of a general outline. Besides, I must agree with Prof. C. Paoli[44] in considering that the "Gesta" cannot have been a strictly individual work, but rather a collection of Florentine news, originally of very meagre proportions, but gradually enriched by fresh annalistic matter and new additions, as it passed from hand to hand. Some compilation of this kind, but of greater weight and repute (now unluckily perished), must have fallen into the hands of various chroniclers, who made use of it in turn, unconscious that it had served others before them. And these chroniclers were again copied by several of a later period.