Esther 2:11

to know. This was Mordecai's solicitude. All this proves that these events must have taken place before the emancipation made by Cyras (the son of this Astyages, App-57), recorded in Ezr. No such secrecy would have been necessary, and no thought of allowing the People, whom he had just emancipated, to be exterminated, as is described in the book of Esther: But Cyrus, being her son, would be carefully prepared by her and Mordecai to begin his reign by such emancipation from Babylon (note, not from Shushan: compare Esther 1:1 with Jeremiah 25:11; Jeremiah 25:12), thus fulfilling Isaiah 44:28 with Isaiah 45:1.