Ben C. Smith of TextExcavation has a helpful presentation of the Testimonium Flavianum, the account of Josephus that mentions Jesus and James the Just. The page has the pertinent texts with translation (see below) along with the parallel texts and translations from Eusebius, Origen, Jerome and others. Here’s a sample – Josephus’ description of James’ martyrdom (Antiquities 20.9.1 §200-203):
Ατε δη ουν τοιουτος ων ο Ανανος, νομισας εχειν καιρον επιτηδειον δια το τεθναναι μεν Φηστον, Αλβινον δ ετι κατα την οδον υπαρχειν, καθιζει συνεδριον κριτων και παραγαγων εις αυτο τον αδελφον Ιησου του λεγομενου Χριστου, Ιακωβος ονομα αυτω, και τινας ετερους, ως παρανομησαντων κατηγοριαν ποιησαμενος παρκεστατοι των κατα την πολιν ειναι και περι τους νομους ακριβεις βαρεως ηνεγκαν επι τουτω και πεμπουσιν προς τον βασιλεα κρυφα παρακαλουντες αυτον επιστειλαι τω Ανανω μηκετι τοιαυτα πρασσειν· μηδε γαρ το πρωτον ορθως αυτον πεποιηκεναι. τινες δ αυτων και τον Αλβινον υπαντιαζουσιν απο της Αλεξανδρειας οδοιπορουντα και διδασκουσιν, ως ουκ εξον ην Ανανω χωρις της εκεινου γνωμης καθισαι συνεδριον. Αλβινος δε πεισθεις τοις λεγομενοις γραφει μετ οργης τω Ανανω ληψεσθαι παρ αυτου δικας απειλων. και ο βασιλευς Αγριππας δια τουτο την αρχιερωσυνην αφελομενος αυτον αρξαντα μηνας τρεις Ιησουν τον του Δαμναιου κατεστησεν. When, therefore, Ananus was of this disposition, he thought he had now a proper opportunity. Festus was now dead, and Albinus was but upon the road; so he assembled the Sanhedrin of judges, and brought before them the brother of Jesus, who was called Christ, whose name was James, and some others. And, when he had formed an accusation against them as breakers of the law, he delivered them to be stoned. But as for those who seemed the most equitable of the citizens, and such as were the most uneasy at the breach of the laws, they disliked what was done; they also sent to the king, desiring him to send to Ananus that he should act so no more, for that what he had already done was not to be justified; nay, some of them went also to meet Albinus, as he was upon his journey from Alexandria, and informed him that it was not lawful for Ananus to assemble a Sanhedrin without his consent. Whereupon Albinus complied with what they said, and wrote in anger to Ananus, and threatened that he would bring him to punishment for what he had done; on which king Agrippa took the high priesthood from him when he had ruled but three months, and made Jesus, the son of Damneus, high priest.