User blog comment:TinyLittleWheatley/The Inverse Cross: The More You Know/@comment-4399137-20130714021938/@comment-3432656-20130714095827

Actually there is more of a mention of the Martyrdom of Peter in the scripture that is called the "Acts of Peter" in the entire "New Testament Apocrypha" which depicts accounts and events about Jesus. The Bibal itself may not contain it but due to the ancient scripture by Origen (some Early Christain Scholar/writer/Scribe) tells us that he was crucified upside down because he felt that he was not worthy to be crucidifed the same way Christ was.