While the Authorized Version remains among the most widely sold, modern critical New Testament translations differ substantially from it in a number of passages, primarily because they rely on source manuscripts not then accessible to (or not then highly regarded by) early-17th-century Biblical scholarship. In the Old Testament, there are also many differences from modern translations that are based not on manuscript differences, but on a different understanding of Ancient Hebrew vocabulary or grammar by the translators. For example, in modern translations it is clear that is referring throughout to mining operations, which is not at all apparent from the text of the Authorized Version.