The history of the theory of translation is by no means a record of easily distinguishable, orderly progression. It shows an odd lack of continuity. Those who give rules for translation ignore, in the great majority of cases, the contribution of their predecessors and contemporaries. Towards the beginning of Elizabeth's reign a small group of critics bring to the problems of the translator both technical scholarship and alert, original minds, but apparently the new and significant ideas which they offer have little or no effect on the general course of theory. Again, Tytler, whose _Essay on the Principles on Translation_, published towards the end of the eighteenth century, may with some reason claim to be the first detailed discussion of the questions involved, declares that, with a few exceptions, he has "met with nothing that has been written professedly on the subject," a statement showing a surprising disregard for the elaborate prefaces that accompanied the translations of his own century. This lack of consecutiveness in criticism is probably partially accountable for the slowness with which translators attained the power to put into words, clearly and unmistakably, their aims and methods. Even if one were to leave aside the childishly vague comment of medieval writers and the awkward attempts of Elizabethan translators to describe their processes, there would still remain in the modern period much that is careless or misleading. The very term "translation" is long in defining itself; more difficult terms, like "faithfulness" and "accuracy," have widely different meanings with different writers. The various kinds of literature are often treated in the mass with little attempt at discrimination between them, regardless of the fact that the problems of the translator vary with the character of his original. Tytler's book, full of interesting detail as it is, turns from prose to verse, from lyric to epic, from ancient to modern, till the effect it leaves on the reader is fragmentary and confusing.