The Mysteries of Mithra is an illustrated book by Franz Cumont, which was first published in 1903. Chapters include: The Origins Of Mithraism; The Dissemination of Mithraism in the Roman Empire; Mithra and the Imperial Power of Rome; The Doctrine of the Mithraic Mysteries; The Mithraic Liturgy, Clergy and Devotees; Mithraism and the Religions of the Empire; and, Mithraic Art. This translation by Thomas J. McCormack was originally published in 1903.
Source and copyright Global Grey Ebooks: https://www.globalgreyebooks.com/index.html. The book can be downloaded from the Global Grey website.