The book of the records - Compare Esther 2:23; Esther 6:1; Esther 10:2. The existence of such a “book” at the Persian court is attested also by Ctesias.
Of thy fathers - i. e., thy predecessors ripen the throne, Cambyses, Cyrus, etc. If Artaxerxes was the Pseudo-Smerdis (Ezra 4:7 note), these persons were not really his “fathers” or ancestors; but the writers of the letter could not venture to call the king an impostor.