permanent nature of the co-regency in Judah from the time of Joash, one may dare to conclude that dating the co-regencies accurately is indeed the key for solving the problems of biblical chronology in the eighth century B.C." Among the numerous scholars who have recognized the co-regency between Ahaz and Hezekiah are Kenneth Kitchen, Leslie McFall and Jack Finegan. McFall, in his 1991 article, argues that if 729 BCE (that is, the Judean regnal year beginning in Tishri of 729) is taken as the start of the Ahaz/Hezekiah co-regency, and 716/715 BCE as the date of the death of Ahaz, then all the extensive chronological data for Hezekiah and his contemporaries in the late eighth century BCE are in harmony. Further, McFall found that no textual emendations are required among the numerous dates, reign lengths, and synchronisms given in the Bible for this period. In contrast, those who do not accept the Ancient Near Eastern principle of co-regencies require multiple emendations of the biblical text, and there is no general agreement on which texts should be emended, nor is there any consensus among these scholars on the resultant chronology for the eighth century BCE. This is in contrast with the general consensus among those who accept the biblical and near Eastern practice of co-regencies that Hezekiah was installed as co-regent with his father Ahaz in 729 BC, and the synchronisms of 2 Kings 18 must be measured from that date, whereas the synchronisms with Sennacherib are measured from the sole reign starting in 716/715 BCE. The two synchronisms to Hoshea of Israel in 2 Kings 18 are then in agreement with the dates of Hoshea's reign that can be determined from Assyrian sources, as is the date of Samaria's fall as stated in 2 Kings 18:10. An analogous situation of two ways of measurement, both equally valid, is encountered in the dates given for Jehoram of Israel, whose first year is synchronized to the 18th year of the sole reign of Jehoshaphat of Judah in (853/852 BC), but his reign is also reckoned according to another method as starting in the second year of the coregency of Jehoshaphat and his son Jehoram of Judah (); both methods refer to the same calendar year. Scholars who accept the principle of co-regencies note that abundant evidence for their use is found in the biblical material itself. The agreement of scholarship built on