From the Leo Depuydt reference (underlined section quoted in WT).
Page 105
A. Is the Canon True
"It is assumed here that the Canon is true. No one has, to my knowledge, refuted any aspect of the Canon on good grounds. On the other hand, to demonstrate the Canon's accuracy positively would not be easy. In the vast network of facts and inferences making up first millenium BCE chronology, the correctness of the Canon is at certain crucial junctures simply accepted as an axiom. To locate those junctures would be no small feat. It has long been known that the Canon is astronomically reliable. Observations dated according to it can all be authenticated. But this does not automatically mean that it is historically dependable."
Page 106 - context of quote after discussing matching a date of an eclipse on 16 July 523.
"The fact that this Greco-Egyptian date from the Almagest, which dates according to the Canon, can be matched with Babylonian date in a Babylonian document adds little for the astronomer, but a great deal for the historian. It does much to guarantee that the portion of the Canon from the Persian period onward is reliable. As regards the earlier rulers, the Canon would need to be compared with the cuneiform record on a reign by reign basis, considering all the dates in the literary and non-literary sources, to establish if, and where, the Canon conflicts whith cuneifrom sources. Agreement seems to be the rule, but this would have to be confirmed".
Has anyone been able to find a full copy of the reference containing the Christopher Walker quote?
Pants