He made use of Eusebius's Church History only through an intermediary compilation of short extracts.
In 1971, a 10th-century Arabic version of the Testimonium due to Agapius of Hierapolis was brought to light by Shlomo Pines who also discovered a 12th-century Syriac version of Josephus by Michael the Syrian.
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Paul Maier states that a comparison of Eusebius' reference with the 10th-century Arabic version of the Testimonium due to Agapius of Hierapolis indicates that the Christian interpolation present in the Testimonium must have come early, before Eusebius.