Flavius Josephus, Antiquities of the Jews
William Whiston, A.M., Ed.

[328] When this was said, Herod commanded that both Alexander and Melas should be carried to Glaphyra, Archelaus's daughter, and that she should be asked, whether she did not know somewhat of Alexander's treacherous designs against Herod? Now as soon as they were come to her, and she saw Alexander in bonds, she beat her head, and in a great consternation gave a deep and moving groan. The young man also fell into tears. This was so miserable a spectacle to those present, that, for a great while, they were not able to say or to do any thing; but at length Ptolemy, who was ordered to bring Alexander, bid him say whether his wife was conscious of his actions. He replied, "How is it possible that she, whom I love better than my own soul, and by whom I have had children, should not know what I do?" Upon which she cried out that she knew of no wicked designs of his; but that yet, if her accusing herself falsely would tend to his preservation, she would confess it all. Alexander replied, "There is no such wickedness as those (who ought the least of all so to do) suspect, which either I have imagined, or thou knowest of, but this only, that we had resolved to retire to Archelaus, and from thence to Rome." Which she also confessed. Upon which Herod, supposing that Archelaus's ill-will to him was fully proved, sent a letter by Olympus and Volumnius; and bid them, as they sailed by, to touch at Eleusa of Cilicia, and give Archelaus the letter. And that when they had ex-postulated with him, that he had a hand in his son's treacherous design against him, they should from thence sail to Rome; and that, in case they found Nicolaus had gained any ground, and that Caesar was no longer displeased at him, he should give him his letters, and the proofs which he had ready to show against the young men. As to Archelaus, he made his defense for himself, that he had promised to receive the young men, because it was both for their own and their father's advantage so to do, lest some too severe procedure should be gone upon in that anger and disorder they were in on occasion of the present suspicions; but that still he had not promised to send them to Caesar; and that he had not promised any thing else to the young men that could show any ill-will to him.