From the early 19th century the Authorized Version has remained almost completely unchanged—and since, due to advances in printing technology, it could now be produced in very large editions for mass sale, it established complete dominance in public and ecclesiastical use in the English-speaking Protestant world. Academic debate through that century, however, increasingly reflected concerns about the Authorized Version shared by some scholars: (a) that subsequent study in oriental languages suggested a need to revise the translation of the Hebrew Bible—both in terms of specific vocabulary, and also in distinguishing descriptive terms from proper names; (b) that the Authorized Version was unsatisfactory in translating the same Greek words and phrases into different English, especially where parallel passages are found in the synoptic gospels; and (c) in the light of subsequent ancient manuscript discoveries, the New Testament translation base of the Greek Textus Receptus could no longer be considered to be the best representation of the original text.