@andrewmarkhenry
Bibliography:
Graffiti and Gematria in Early Christianity: https://www.patheos.com/blogs/bibleandculture/2012/04/22/graffiti-and-gematria-in-early-christianity/
Lincoln Blumell, 'Lettered Christians: Christians, Letters, and Late Antique Oxyrhynchus,' 2012
Christopher Frilingos, 'Spectacles of Empire: Monsters, Martyrs, and the Book of Revelation,' 2013.
Elaine Pagels, Revelations: Visions, Prophecy, and Politics in the Book of Revelation,' 2013.