Hi Ann:
We have to bear in mind that further study and discoveries have come to light since then (e.g. the confusion about Belshazzar's identity is now resolved). However, p. 23f. shows how the company heads' years of service dovetails with Babylonian kings' regnal years (the list Ptolemy used) so that the total of years' service by various company heads coincides with the total of regnal years for Babylonian kings for the same period - there's no disparity between the two figures. Moreover, certain astronomically fixed regnal years provide further landmark points against which to check those figures. There simply is no room to insert an extra 20 years into their business history.
Simply referencing surviving revised documents doesn't prove anything but what the revisionists intended. If you want to take the word of these revised records or the Bible, then that's your choice. But know for certain the Bible's own critical timeline is clearly established now. 455 BCE has to begin the "70 weeks" in the 1st of Cyrus. To that we add 70 years back to the last deportation, year 23 of Neb2. That means year 37 falls in 511 BCE as confirmed by the VAT4956, and year 7 falls in 541 BCE as confirmed by the SK400. We use the 709 BCE eclipse to date the Assyrian Period and Shishak's invasion to c. 871 BCE, which is precisely where the C14 dating from Rehov for that event is dated. This falls in year 39 of Solomon so his 4th year falls in 906 BCE, making the Exodus fall in 1386 BCE. The Exodus is exactly 19 jubilees prior to the jubilee of the return of the Jews from Babylon in 455 BCE, thus...
19 x 49 = 931
1386 - 931 = 455 BCE
Of course, the entire week of jubilees, a period of 70 jubilees or 3430 years must celebrate the 70th jubilee in connection with the final return from exile, which occurs in 1947. That means the entire 70 jubilees ends in 1996 and begins in 1435 BCE. The Exodus is the first jubilee and thus occurs in 1386 BCE.
So now, since 1947, we can date the return to 455 BCE and the Exodus to 1386 BCE per Bible chronology. So if you don't have these dates, whether or not you use secular references for major events, you can't claim these are Biblical dates. If you are not using these dates, you are not using the official Biblical timeline, whether you believe the Bible's dates are right or wrong.
Of course, it should be obvious that the promised messiah returns to fulfil the 70th week of 490 years, but also the 490th week of 3430 years, and the 7th week of the last 49 years. Thus the messiah must return, obviously during th e70th week of 1989-1996. Otherwise, the Bible is not true. Of course, I'm in a position to confirm this is precisely what took place. Christ returned to human form on December 25, 1992.
LS