The places in which these remains of ancient literature had been preserved, during the middle ages, were too many, and they were too distant from each other, and they were too little connected by any kind of intercourse, to admit of a combination or conspiracy having for its object any supposed purposes of interpolation or corruption. Possessing therefore as we do, in most cases, copies of the same author, some of which were drawn from the monasteries of England, others from those of Spain, and others collected in Egypt, Palestine, or Asia Minor, if, on comparing them, we find that they agree, except in variations of little moment, we have an incontestable proof of the care and integrity with which the business of transcription had generally been conducted. For it is evident that if the practice of mutilation, interpolation, and corruption, had to any considerable extent been admitted, the existing remains of ancient authors, after so long a time, would have retained scarcely a trace of integrity or uniformity. A licentious practice of transcription, operating through the course of a thousand or fifteen hundred years, must have resulted, not in giving us the connected and consistent works we actually possess, but only a heterogeneous mass of mangled fragments. But now, if the general accordance of existing manuscripts attests the prevailing care, and even the scrupulousness of those through whose hands they passed, the peculiar nature of the diversities that do exist among the several copies of the same author, serves to establish a fact which, if we did not know it by other means, it would be of the highest importance to prove: namely, that these works _had already descended through a long course of time, when the existing copies were executed_. This fact is especially apparent in the case of the earlier Greek authors; for while some copies retain uniformly the peculiarities of the dialect in which the author wrote; in others, these peculiarities are merged in those more common forms of the language which prevailed after the time of the decline of the Greek literature. These deviations in orthography, or in construction, from the author’s text, were evidently made by successive copyists in compliance with the tastes of purchasers of books in different countries; nor were they likely to have been effected by transcribers of _the middle ages_, when these books were no longer in use by readers to whom the language was vernacular, and to whom, alone, an accordance with the colloquial forms of the language could be a matter of any importance.