Complex sentence: According to the apocryphal Acts of Barnabas, Barnabas carried a copy of the Gospel with him, which he had written and that was buried with him, and later unearthed after a dream by Archbishop Anthemius of Salamis.
Split into simpler sentences: According to the apocryphal Acts of Barnabas, Barnabas carried a copy of the Gospel with him that he had written. It was buried with him and later unearthed after a dream by Archbishop Anthemius of Salamis.